Unit 1 The Nature of Life Review

1. To be useful in science, a hypothesis must be

• a. Measurable

• b. Observable

• c. Testable

• d. Correct

How many independent variables are there in a controlled experiment?

• None

• One

• One or more

• It depends on the experiment

What is the independent variable in this experiment?

• Temperature

• Amount of water

• Soil type

• Amount of light

What is the dependent variable in this experiment?

• Plant Height

• Plant Mass

• Size of pot

• Amount of Water

What is a control in the experiment pictured?

• Plant Height

• Plant Mass

• Amount of water

• Amount of light

What can the scientist conclude from this experiment?

• Plants grow best in 60 degrees F

• Plants grow best when given 1 cup of water

• Plants grow best when planted in batches of 10

• The scientist can not draw conclusions about this experiment

The building up and breaking down of body tissue is an example of

• DNA

• Homeostasis

• Metabolism

• Equilibrium

Which type of bond is pictured and how do you know?

• Covalent: the electrons are shared.

• Ionic: the electrons are shared.

• Covalent: the electrons are transferred.

• Ionic: the electrons are transferred.

The ability of water to stick to itself (shown in the picture) is called

• adhesion

• capillary action

• polarity

• cohesion

Which elements are most abundant in living organisms?

• carbon, hydrogen, oxygen, nitrogen, sulfur and phosphorus

• sodium, potassium, calcium, nitrogen, phosphorus, sulfur

• carbon, hydrogen, oxygen, fluorine, chlorine, iodine

• fluorine, chlorine, iodine, nitrogen, phosphorus, sulfur