Unit 1

Question 1

interactions of atoms in a covalent bond

Answer 1

The atoms mutually share electrons

Question 2

the charge of an oxygen atom in a water molecule

Answer 2

negative

Question 3

the basic unit of matter

Answer 3

atom

Question 4

the charge of an electron

Answer 4

negative

Question 5

the particle with no charge

Answer 5

neutron

Question 6

How are ionic bonds formed

Answer 6

when one atom gives up an electron and another atom receives it

Question 7

Why can water have no net charge but have slight charges in different parts of the molecule?

Answer 7

The oxygen is slightly negative and the hydrogen is slightly positive

Question 8

Why does Gatorade dissolve in water

Answer 8

Water can form hydrogen bonds with many molecules, including Gatorade molecules because they are both polar

Question 9

The tree types of bonds: Strongest to Weakest

Answer 9

1. Covalent
2. Ionic
3. Hydrogen

Question 10

The bond that makes water molecules attracted to water molecules

Answer 10

hydrogen

Question 11

What is found in the nucleus of an atom

Answer 11

protons and neutrons

Question 12

The chemicals that all living things need to survive

Answer 12

carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur (CHNOPS)

Question 13

How do covalent bonds form

Answer 13

When they mutually share electrons

Question 14

5 characteristics of life

Answer 14

Growth
homeostasis
reproduction
obtain and use energy
response to stimuli

Question 15

What is the scientific method

Answer 15

1. Identify the Problem
2. Make Observations
3. Make a Prediction-Hypothesis
4. Design the Experiment
5. Collect and Organize Data
6. Make Conclusions

Question 16

Approach to ethical decision-making:

Answer 16

Ends-based: Good for the greatest number
Rule-based: Live by a moral or religious code or
law
Care-based: Golden rule “Treat others the way
you want to be treated”

Question 17

Charges of atoms

Answer 17

Protons - positive
neutrons - neutral
electrons - negative

Question 18

charges of the atoms in water molecules

Answer 18

Water has two hydrogen which are slightly positive and the oxygen is slightly negative

Question 19

How do hydrogen bonds form

Answer 19

It forms when two water molecules interact where a negative oxygen atom attracts to the other molecule’s positive hydrogen atom

Question 20

Why is water the universal solvent

Answer 20

Can provide an environment in which reactions can occur
while it uses its properties to separate ionic substances into ions

Question 21

Energetics definition

Answer 21

Energetics is the attractive forces between atoms
Or molecules.

Question 22

Entropy definition

Answer 22

How molecules and atoms can be arranged based
on random motion

Question 23

Polarity definition:

Answer 23

When the oxygen end is slightly negative and the hydrogen end is slightly positive

Question 24

Independent variable

Answer 24

Variable that is purposely changed to test a hypothesis.

Question 25

Dependent variable

Answer 25

The factor that may change in response to the
manipulated/independent variable

Question 26

Control variable

Answer 26

The variable that does not change which serves as the baseline for comparison