Flashcard on Whales and Elements

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include Sodium, Oxygen, and Chlorine.

Front

Which of the following is not an element: Sodium, Oxygen, Chlorine, or Water?

Back

Water is not an element; it is a compound made of hydrogen and oxygen.

Front

What happens to the sun as it nears the end of its life cycle?

Back

The sun will become a red giant and eventually a white dwarf.

Front

What is a white dwarf?

Back

A white dwarf is a small, dense star that is the remnant of a low or medium mass star after it has exhausted its nuclear fuel.

Front

What is the mass of protons and neutrons compared to electrons?

Back

Protons and neutrons have an atomic mass unit of approximately one, while electrons are much smaller and have negligible mass.

Front

In a neutrally charged atom, what is true about protons and electrons?

Back

In a neutrally charged atom, the number of protons equals the number of electrons.

Front

What is force in the context of motion?

Back

Force is a push or pull on an object that can cause it to accelerate, change direction, or change shape.

Front

If four carts with the same mass are pushed, how can we determine which student used the least force?

Back

The student who took the longest time to complete the race exerted the least amount of force.

Front

What is heat energy?

Back

Heat energy is the energy that comes from the temperature of matter. It is transferred from one object to another due to a temperature difference.

Front

How does heat energy affect air molecules?

Back

Heat energy causes air molecules to increase in temperature, which decreases their density, causing them to expand and rise.