Science midterm study guide

Front

What is the difference between a compound and an element?

Back

A compound is a substance made up of two or more simpler substances and can be broken down into simpler substances. An element is a substance that cannot be broken down into simpler substances.

Front

What does it mean to have high reactivity?

Back

Having high reactivity means a substance chemically combines easily.

Front

What three things cause gas pressure to increase?

Back

Increase temperature, increase the amount of particles, decrease volume.

Front

How do scientists who speak different languages make their data understandable to one another?

Back

They all use SI (International System of Units).

Front

How do you write small numbers in scientific notation? Such as 0.00000056

Back

5.6 x 10^-7.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together.

Front

What is the significance of the SI system in science?

Back

The SI system provides a standard set of measurements that scientists around the world can understand and use.

Front

What is gas pressure?

Back

Gas pressure is the force exerted by gas particles colliding with the walls of their container.

Front

What happens to gas pressure when temperature increases?

Back

Gas pressure increases when temperature increases, assuming volume and amount of gas remain constant.