Biology I-1: Ch. 2 Test

The three particles that make up atoms are

• protons, neutrons, and electrons.

• positives, negatives, and neutrals.

• protons, neutrons, and isotopes.

• neutrons, isotopes, and electrons.

Tags

NGSS.MS-PS1-1

Which of the following is a substance formed by the chemical joining of two or more elements in definite amounts?

• compound

• isotope

• nucleus

• enzyme

Which of the following makes up a molecule of water?

• one atom of hydrogen and two atoms of oxygen

• two atoms of hydrogen and one atom of oxygen

• one atom of sodium and one atom of chlorine

• one atom of hydrogen and one atom of oxygen

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NGSS.MS-PS1-1

What type of ion forms when an atom loses electrons?

• positive

• neutral

• negative

• radioactive

Amino acid is to protein as

• sugar is to fat.

• simple sugar is to starch.

• fat is to lipid.

• DNA is to RNA.

When hydrogen and oxygen combine to form water, water is

• a reactant.

• an enzyme.

• a product.

• a catalyst.

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NGSS.MS-PS1-1

NGSS.MS-PS1-5

The energy needed to get a reaction started is the

• activation energy.

• adhesion energy.

• cohesion energy.

• chemical energy.

Enzymes affect the reactions in living cells by changing the

• speed of the reaction.

• products of the reaction.

• temperature of the reaction.

• pH of the reaction.

What are found in the space outside the nucleus of an atom?

• electrons

• protons

• neutrons

• ions

Isotopes are atoms of the same element with the same number of protons and a different number of

• neutrons.

• ions.

• electrons.

• molecules.

Tags

NGSS.HS-PS1-8