Scientific Perspective

Froggy Jumps

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Challenge 6, 7

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Alejandra Vega

México

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Scientific Perspective


Froggy Jumps Scientific PerspectiveVersión en línea Challenge 6, 7 por Alejandra Vega 1 What is light? a A form of energy b A type of matter c A type of gas 2 Which object is luminous? a The Moon b The Sun c A mirror 3 How does light travel? a In circles b In zigzags c In waves 4 Approximately how fast does light travel? a 300,000 km per second b 300 km per hour c 3,000 km per minute 5 Which statement about light is TRUE? a It only travels at night. b It moves in straight lines. c It always changes direction. 6 White light is made of... a One wavelength b Two colors only c Eight different wavelengths 7 Which of these is NOT a property of light? a Magnetism b Polarization c Diffraction 8 Light interference happens when... a Light changes into sound. b Different light waves cross each other. c Light disappears. 9 Which object commonly shows light interference? a A pencil b A notebook c A CD 10 Diffraction occurs when light... a Spreads out and bends around objects. b Stops moving. c Changes into heat. 11 Polarized sunglasses help because they... a Produce more light. b Redirect light waves. c Create new colors. 12 What is a lens? a A transparent object that stores light energy. b A mirror that reflects light in all directions. c A piece of optical equipment that bends or focuses light. 13 A convex lens is... a Thicker in the center. b Thinner in the center. c Completely flat. 14 Another name for a convex lens is... a Diverging lens b Converging lens c Flat lens 15 Which instrument commonly uses a convex lens? a Flashlight b Hammer c Microscope 16 A concave lens makes images appear... a Smaller b Larger c Brighter 17 Another name for a concave lens is... a Reflecting lens b Diverging lens c Converging lens 18 Concave lenses are commonly used to help people with... a Deafness b Color blindness c Nearsightedness 19 What is a machine? a Something we use to make a job easier. b A device that only works with electricity. c A tool that stores energy for future use. 20 Which of these is a simple machine? a Computer b Lever c Television 21 A lever has two main parts: a Wheel and rope b Screw and wedge c Bar and fulcrum 22 Which simple machine uses a wheel with a rope or chain? a Pulley b Wedge c Screw 23 Which example is an inclined plane? a Bicycle b Ramp c Axe 24 Screws are actually... a Wheels with handles. b Small wedges. c Inclined planes wrapped around a pole. 25 Which object is an example of a wedge? a Chisel b Fishing rod c Ladder 26 A wheel and axle helps people... a Produce electricity. b Move things more easily. c Reflect light. 27 A compound machine is made of... a One simple machine. b One wheel only. c Two or more simple machines. 28 In science, work happens when... a A force moves an object. b You think very hard. c You carry something without moving it. 29 Which formula is used to calculate work? a Work = Force + Distance b Work = Force × Distance c Work = Distance ÷ Force 30 Which unit is used to measure work? a Newton b Meter c Joule

Scientific Perspective

Froggy Jumps

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Scientific PerspectiveVersión en línea

por Alejandra Vega

What is light?

Which object is luminous?

How does light travel?

Approximately how fast does light travel?

Which statement about light is TRUE?

White light is made of...

Which of these is NOT a property of light?

Light interference happens when...

Which object commonly shows light interference?

Diffraction occurs when light...

Polarized sunglasses help because they...

What is a lens?

A convex lens is...

Another name for a convex lens is...

Which instrument commonly uses a convex lens?

A concave lens makes images appear...

Another name for a concave lens is...

Concave lenses are commonly used to help people with...

What is a machine?

Which of these is a simple machine?

A lever has two main parts:

Which simple machine uses a wheel with a rope or chain?

Which example is an inclined plane?

Screws are actually...

Which object is an example of a wedge?

A wheel and axle helps people...

A compound machine is made of...

In science, work happens when...

Which formula is used to calculate work?

Which unit is used to measure work?