SCIENCE 9 REVIEWER TERM 1 EXAMINATION

Froggy Jumps

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Gemma Valdez

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SCIENCE 9 REVIEWER TERM 1 EXAMINATION


Froggy Jumps SCIENCE 9 REVIEWER TERM 1 EXAMINATIONVersión en línea You've prepared for this. Trust yourself! por Gemma Valdez 1 You are riding a bike and suddenly brake. Your body leans forward. What causes this? a air resistance b inertia c friction 2 A book on a table does not move. Which force balances gravity? a applied force b tension force c normal force 3 Balanced forces do not change an object's motion. Which situation shows balanced forces? a A book resting on a table b A car slowing down. c A soccer ball flying in the air. 4 Kristine draws a force diagram of a book resting on a table. Which forces should be shown to explain why the book stays at rest? a A downward force only b Equal upward and downward forces c An upward force only 5 Hannah notices that a chair does not break when someone sits on it. What can be concluded about the forces between her and the chair? a The chair exerts no force on the student. b The student exerts more force than the chair. c The chair exerts an upward force that balances the student's weight. 6 Claire is labeling the parts of a circuit diagram. Which instrument is used to measure electric current in a circuit? a Ammeter b Battery c Resistor 7 A learner studies a series circuit with three light bulbs connected to one battery. What will happen if one bulb is removed? a The battery stops working. b The entire circuit stops working. c The remaining bulbs brighten. 8 Niko is assembling a series circuit with a battery, switch, bulb, ammeter, and voltmeter. Where should the ammeter be placed? a Across the battery only b In series with the bulb c Across the bulb 9 A learner compares two diagrams. Diagram A shows a voltmeter across a bulb, while Diagram B shows a voltmeter in series with a bulb. Which diagram correctly measures the bulb's voltage? a Both diagrams shown b Diagram A c Diagram B 10 A student must create a circuit diagram that measures the current through a resistor. Which arrangement should the student draw? a Battery, switch, ammeter, resistor b Battery, voltmeter, resistor c Battery, resistor, voltmeter, switch 11 During a science discussion, the class reviews the definition of electromagnetic radiation. What is electromagnetic radiation? a A type of force b A form of matter c A form of energy 12 Consider how electromagnetic radiation is produced. Which particles generate electromagnetic radiation when they vibrate? a charged particles b atoms c water molecules 13 While studying the electromagnetic spectrum, the wave with the longest wavelength is identified. Which wave is it? a gamma rays b radio waves c microwaves 14 Sunlight travels from the Sun to Earth through space. What does this show about electromagnetic waves? They ____________. a require air b can travel without a medium c require water 15 If the frequency of a wave increases while the speed stays the same, what happens to the wavelength? a stays the same b decreases c increases 16 During a medical checkup, a doctor needs to examine a patient's fractured arm. Which electromagnetic wave is most appropriate? a Gamma rays b X-rays c Radio waves 17 A broadcasting company wants to transmit news and music over long distances. Which electromagnetic wave should be used? a Infrared waves b Ultraviolet rays c Radio waves 18 Examine the following waves. Which arrangement is ordered from lowest to highest frequency? a A. Radio → Microwave → Infrared → Visible → Ultraviolet → X-ray → Gamma b B. Gamma → X-ray → Ultraviolet → Visible → Infrared → Microwave → Radio c C. Radio → Infrared → Microwave → Visible → X-ray → Ultraviolet → Gamma 19 A health campaign advises people to avoid prolonged exposure to intense sunlight. Which conclusion BEST justifies this recommendation? a Excess ultraviolet exposure can harm the skin. b Radio waves damage skin causing sunburn. c Visible light breaks bones and damage cells. 20 A group is creating an electromagnetic spectrum model to illustrate the relationship between wavelength and frequency. Which statement should appear in the model? a Higher frequency means shorter wavelength. b Higher frequency means longer wavelength. c Frequency and wavelength remain equal. 21 Telecommunications allow people to send information over long distances. Which electromagnetic wave is commonly used in telecommunications? a Microwaves b Ultraviolet rays c Radio waves 22 Cancer treatment sometimes uses high-energy electromagnetic radiation. Which electromagnetic wave is commonly used? a Gamma rays b UV rays c Radio waves 23 Thermal imaging cameras detect heat from objects and living things. Which electromagnetic wave makes this possible? a gamma rays b visible light c infrared rays 24 X-rays and gamma rays are both used in medicine. How do their applications differ? a Both are mainly used for broadcasting signals. b Both are mainly used to heat food. c X-rays are used for imaging, while gamma rays are used for treatment. 25 A male scientist uses X-rays to check cracks in airplane wings. Why did he use X-rays? a They create visible cracks with high heat. b They can pass through solid material and reveal hidden flaws. c They make the wing glow for easy inspection. 26 Engineers need to monitor heat leaks in a building. Which electromagnetic wave is most useful? a microwaves b radio waves c infrared rays 27 A cancer specialist must destroy cancer cells while minimizing surgery. Which electromagnetic wave is most appropriate? a gamma rays b microwaves c infrared rays 28 Compare the following technologies: mobile phones, radio broadcasting and wi-fi networks. What common application do they share? a Medical treatment b Telecommunications c Heating objects 29 A student argues that UV lamps in hospitals are used for disinfection. Which explanation is correct? UV radiation ________________. a cools the air and kills germs b kills bacteria by damaging their DNA c removes oxygen needed by bacteria 30 An infographic is being created to show how electromagnetic waves improve daily life. Which set of examples should be included to represent communication and medicine? a Infrared rays for telecommunications and visible light for cancer treatment b Gamma rays for broadcasting and radio waves for cancer treatment c Radio waves for telecommunications and X-rays for medical imaging 31 Excessive exposure to certain electromagnetic waves can affect human health. Which electromagnetic wave can cause sunburn? a Radio waves b Ultraviolet rays c Infrared rays 32 Alfred Wegener proposed that Earth's continents were once joined together. What was the name of this supercontinent? a Laurasia b Eurasia c Pangaea 33 Scientists use several types of evidence to support continental drift. Which evidence involves identical fossils found on different continents? a Climate evidence b Rock evidence c Fossil evidence 34 Mobile phones use radiofrequency radiation. Which of the following is true? It . a produces X-rays inside the phone b causes instant cancer in users c may slightly heat tissues but at safe levels 35 Why do astronauts wear thick suits in space? To . a protect from friction with air b block harmful gamma & UV rays from the Sun c avoid visible light exposure 36 A student notices matching rock formations along the east coast of South America and the west coast of Africa. How can this observation be used? To _________________. a explain ocean currents b predict earthquakes c support the idea of continental drift 37 Fossils of a reptile species are found on continents separated by a vast ocean. Which conclusion applies Wegener's idea? a The continents were once united b The ocean was once smaller. c The reptiles migrated by air. 38 Two continents have similar fossils but different climates today. What does this analysis suggest? a The continents were connected before separating. b Climate never changes. c Climate determines fossil types. 39 A researcher must choose the strongest evidence for continental drift. Which finding provides the best support? a Different sizes of continents b Matching fossils and rock layers on distant continents c Similar weather conditions 2,000 years ago 40 A group is creating a poster explaining why scientists believe continents were once connected. Which combination of evidence should be included? a Fossils, rock formations, and continental fit b Volcanoes and earthquakes only c Ocean waves and weather patterns

SCIENCE 9 REVIEWER TERM 1 EXAMINATION

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SCIENCE 9 REVIEWER TERM 1 EXAMINATIONVersión en línea

por Gemma Valdez

You are riding a bike and suddenly brake. Your body leans forward. What causes this?

A book on a table does not move. Which force balances gravity?

Balanced forces do not change an object's motion. Which situation shows balanced forces?

Kristine draws a force diagram of a book resting on a table. Which forces should be shown to explain why the book stays at rest?

Hannah notices that a chair does not break when someone sits on it. What can be concluded about the forces between her and the chair?

Claire is labeling the parts of a circuit diagram. Which instrument is used to measure electric current in a circuit?

A learner studies a series circuit with three light bulbs connected to one battery. What will happen if one bulb is removed?

Niko is assembling a series circuit with a battery, switch, bulb, ammeter, and voltmeter. Where should the ammeter be placed?

A learner compares two diagrams. Diagram A shows a voltmeter across a bulb, while Diagram B shows a voltmeter in series with a bulb. Which diagram correctly measures the bulb's voltage?

A student must create a circuit diagram that measures the current through a resistor. Which arrangement should the student draw?

During a science discussion, the class reviews the definition of electromagnetic radiation. What is electromagnetic radiation?

Consider how electromagnetic radiation is produced. Which particles generate electromagnetic radiation when they vibrate?

While studying the electromagnetic spectrum, the wave with the longest wavelength is identified. Which wave is it?

Sunlight travels from the Sun to Earth through space. What does this show about electromagnetic waves? They ____________.

If the frequency of a wave increases while the speed stays the same, what happens to the wavelength?

During a medical checkup, a doctor needs to examine a patient's fractured arm. Which electromagnetic wave is most appropriate?

A broadcasting company wants to transmit news and music over long distances. Which electromagnetic wave should be used?

Examine the following waves. Which arrangement is ordered from lowest to highest frequency?

A health campaign advises people to avoid prolonged exposure to intense sunlight. Which conclusion BEST justifies this recommendation?

A group is creating an electromagnetic spectrum model to illustrate the relationship between wavelength and frequency. Which statement should appear in the model?

Telecommunications allow people to send information over long distances. Which electromagnetic wave is commonly used in telecommunications?

Cancer treatment sometimes uses high-energy electromagnetic radiation. Which electromagnetic wave is commonly used?

Thermal imaging cameras detect heat from objects and living things. Which electromagnetic wave makes this possible?

X-rays and gamma rays are both used in medicine. How do their applications differ?

A male scientist uses X-rays to check cracks in airplane wings. Why did he use X-rays?

Engineers need to monitor heat leaks in a building. Which electromagnetic wave is most useful?

A cancer specialist must destroy cancer cells while minimizing surgery. Which electromagnetic wave is most appropriate?

Compare the following technologies: mobile phones, radio broadcasting and wi-fi networks. What common application do they share?

A student argues that UV lamps in hospitals are used for disinfection. Which explanation is correct? UV radiation ________________.

An infographic is being created to show how electromagnetic waves improve daily life. Which set of examples should be included to represent communication and medicine?

Excessive exposure to certain electromagnetic waves can affect human health. Which electromagnetic wave can cause sunburn?

Alfred Wegener proposed that Earth's continents were once joined together. What was the name of this supercontinent?

Scientists use several types of evidence to support continental drift. Which evidence involves identical fossils found on different continents?

Mobile phones use radiofrequency radiation. Which of the following is true? It .

Why do astronauts wear thick suits in space? To .

A student notices matching rock formations along the east coast of South America and the west coast of Africa. How can this observation be used? To _________________.

Fossils of a reptile species are found on continents separated by a vast ocean. Which conclusion applies Wegener's idea?

Two continents have similar fossils but different climates today. What does this analysis suggest?

A researcher must choose the strongest evidence for continental drift. Which finding provides the best support?

A group is creating a poster explaining why scientists believe continents were once connected. Which combination of evidence should be included?