Biology Ch 2 matter

The physical stuff that makes up everything in the universe is known as

• mass.

• elements.

• matter.

• energy.

Which of the following is not a smaller part of an atom?

• nucleus

• ion

• proton

• electron

Temperature is a measurement of

• the amount of matter in an object.

• how much energy an object has.

• the amount of energy stored in chemicals.

• the speed of moving particles.

A compound held together by opposite electrical charges is a(n) __________.compound.

• covalent

• ionic

• molecular

• electrical

Covalent compounds form when atoms __________.electrons.

• share

• lose

• gain

• exchange

Which of the following is not a reason why carbon is important for life?

• Carbon atoms can form chains or rings

• Carbon can bond with itself.

• Carbon can form up to four bonds.

• Carbon can form graphite and diamonds.

The main purpose of carbohydrates for living things is for

• storage

• fuel.

• information.

• body coverings.

Lipids include

• fats.

• sugars.

• amino acids.

• nucleotides.

Proteins are organic polymers consisting of chains of

• simple sugars.

• nucleotides

• amino acids.

• R groups.

The outermost electrons in an atom are called valence electrons.

• true

• false