3/31 Science | Questions of the Day

Ryan and Noah were studying forces and decided to do an experiment. They placed four equally sized blocks made of different materials on an elevated plastic tray. They watched each of the blocks move down the tray. Their setup is shown.

Which force causes the blocks to move down the tray?

• Electric

• Friction

• Gravity

• Magnetic

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Ryan and Noah were studying forces and decided to do an experiment. They placed four equally sized blocks made of different materials on an elevated plastic tray. They watched each of the blocks move down the tray. Their setup is shown.

Which block would experience the least amount of friction as it moved down the tray?

• Ice Block

• Sponge Block

• Sandpaper Block

• Plastic Block

Ryan and Noah were studying forces and decided to do an experiment. They placed four equally sized blocks made of different materials on an elevated plastic tray. They watched each of the blocks move down the tray. Their setup is shown.

Which of the following conclusions can Ryan and Noah make about the forces that cause the blocks to move down the tray?

• The force of friction is the same on each block.

• The force of friction causes the speed of each block to increase.

• The force of gravity causes all the blocks to move at the same speed.

• The force of gravity is greater than the force of friction on all the blocks.

Tags

NGSS.MS-PS2-2

Gavin followed these steps of an investigation:

• 1) Collect five objects made of different types of metal.

• 2) Place them on a large laboratory table.

• 3) Touch each metal object with a magnet and lift slowly.

• 4) Record observations.

Which of the following statements is Gavin most likely testing?

• Some types of metal are attracted to magnets.

• Each magnet can lift the metal object to the same height.

• Larger magnets can pick up heavier metal objects than smaller magnets can.

• Heavier metal objects are more attracted to magnets than lighter metal objects are.

Tags

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Peter is performing an investigation using several earthworms. He places a rectangular box under a bright lamp and covers half of the box so that it is shaded. Then, he puts the earthworms into the box on the side that is still brightly lit. Later, Peter notices that all of the earthworms have crawled over to the shaded side of the box. Based on his investigation, which of the following is an observation rather than an opinion?

• Earthworms are afraid of light.

• Earthworms like staying together.

• Earthworms move away from light.

• Earthworms like living in the ground.

Deon is designing an experiment to see whether sugar or artificial sweetener will attract the greater number of ants. Which statement best describes why Deon should write down his experimental procedure and record his data?

• The exact experiment can be repeated by others and the results compared.

• The experiment can be changed by others to get different results.

• The data will help people decide what type of sweetener to use.

• The data will show people which ants are more common.

Tags

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A star named Sirius appears as the brightest star in the nighttime sky, even though a star named Pollux actually gives off more light. Which of the following best explains why Sirius appears brighter than Pollux in our nighttime sky?

• Sirius is made of different gases than Pollux is.

• Sirius is a different color than Pollux is.

• Sirius is closer to Earth than Pollux is.

• Sirius is larger than Pollux is.