Grade 4 Energy: Non-contact forces Unit review

Which of the following is an example of a non-contact force?

• Friction

• Gravity

• Muscle force

• Tension

What scientific figure is associated with the laws of motion and is mentioned in the unit?

• Albert Einstein

• Charles Darwin

• Sir Isaac Newton

• Nikola Tesla

Which activity would help students understand the concept of magnetic fields?

• Experiment – egg drop test

• Activity – will the magnets attract or repel?

• Experiment – bending water

• Coding activity – hard drives and binary code

What is one of the harmful effects of magnets that is covered in the unit?

• Harmful effects of static electricity

• Dangers of static electricity

• Research activity – Sir Isaac Newton

• Experiment – magnetizing a nail

Which of the following topics is NOT explicitly listed in the table of contents for the Alberta Science 2023 Curriculum – Grade 4 – Energy: Non-Contact Forces Unit?

• How a compass works – magnetic field

• Devices that use non-contact forces

• Experiment – testing the force of gravity

• Experiment – creating a vacuum

What are non-contact forces?

• Forces that require objects to be touching

• Forces that occur between objects that are not in direct contact

• Forces that can only act through materials

• Forces that are weakest at the magnetic poles

Which of the following is a non-contact force that pulls objects toward the ground?

• Magnetic force

• Friction

• Gravity

• Electric force

What do magnetic materials contain?

• Aluminum, copper, or zinc

• Iron, cobalt, or nickel

• Carbon, silicon, or phosphorus

• Oxygen, hydrogen, or nitrogen

What happens to the strength of non-contact forces as objects get farther apart?

• It increases

• It fluctuates

• It stays the same

• It decreases

What is true about magnetic poles?

• Like magnetic poles attract each other

• Magnetic force is weakest at the magnetic poles

• Opposite magnetic poles attract each other

• Magnets have only one magnetic pole