2021 Grade-4 Unit-1 Test Review

Why is it harder for the boy in image B to roll down the hill?

• motion

• friction

• work

• energy

Answer explanation

4.6D Investigating forces (Force and Motion)

Students rolled a baseball down a ramp and measured the distance it traveled on three different surfaces. What question could they be trying to answer?

• Why do baseballs stop after rolling down a ramp?

• How does friction change how far a baseball rolls?

• How does a baseball stop rolling on a flat surface?

• Which kind of ball rolls the furthest down a ramp?

Answer explanation

4.6D Investigating forces (Force and Motion)

Students conduct an investigation by rolling a car down a ramp covered with four different surfaces, while measuring the time it takes for the car to travel from the top of the ramp to the bottom of the ramp. The results are shown in the graph. Which surface causes the LEAST amount of friction?

• Surface W

• Surface X

• Surface Y

• Surface Z

Answer explanation

4.6D Investigating forces (Force and Motion)

The ability to conduct electricity is a physical property. Which of the following materials is a good conductor of electricity?

• rubber

• plastic

• copper

• cloth

What happens to the water in a pot when the water evaporates?

• It becomes a new substance

• It gets colder.

• It changes to a gas

• It becomes a solid

Students enter science class. Students see the science materials shown. What should students do first?

• Put a circuit together

• Attach the wire to the bulb and socket

• Mix the water and salt together

• Wait for the teacher's directions

_____ is a tool that is used to measure the amount of liquid, or volume, in a container.

• Flask

• Test tube

• Graduated cylinder

• Anemometer

what force is illustrated in this picture?

• push

• gravity

• pull

• friction

Answer explanation

4.6D Investigating forces (Force and Motion)

Which group of items could be used to investigate the strength of different magnets?

• Magnets, iron nails, triple beam balance

• Magnets, water, aluminum foil

• Magnets, hand lens, graduated cylinder

• Magnets, pennies, ruler

Answer explanation

4.6D Investigating forces (Force and Motion)

Students investigated if water balloons dropped from greater heights made larger splatters. This experiment is an investigation of the effect of which of the following?

• Sound

• Temperature

• Gravity

• Magnetism

Answer explanation

4.6D Investigating forces (Force and Motion)