STEM Knowledge Test

What force pulls objects towards the center of the Earth?

• Magnetism

• Friction

• Gravity

• Elasticity

What do we call the energy an object has due to its motion?

• Potential energy

• Thermal energy

• Kinetic energy

• Chemical energy

What is the unit of measurement for force?

• Watt

• Joule

• Newton

• Volt

What is the chemical symbol for water?

• CO2

• H2O

• O2

• NaCl

What happens when you mix baking soda and vinegar?

• It turns red.

• It explodes.

• It produces carbon dioxide gas and fizzes.

• It becomes transparent.

Which gas do plants absorb from the air to make food through photosynthesis?

• Oxygen

• Carbon monoxide

• Carbon dioxide

• Nitrogen

What is the smallest unit of an element that retains its chemical properties?

• Molecule

• Atom

• Ion

• Cell

What is the chemical symbol for oxygen?

• O

• O2

• CO2

• H2O

How many chambers does the human heart have?

• Two

• Three

• Four

• Five

What is the main function of the lungs in the human body?

• Digestion

• Blood circulation

• Respiration

• Filtration