Bio Basics

What glassware is NEVER used for making measurements?

• graduated cylinder

• beaker

• test tube

• Erlenmeyer flask

The following pieces of equipment could be used for transferring a liquid from one container to another EXCEPT

• beaker

• petri dish

• funnel

• graduated cylinder

Micha needs 25 mL of motor oil to test his combustion engine. Which tool would give him the most precise measurement?

• beaker

• flask

• test tube

• graduated cylinder

When designing an experiment, scientists will test a relationship between a 'cause' and an 'effect.' The 'effect,' also represented by what the scientists measures and records, is known as the

• dependent variable

• constant

• independent variable

• control group

When leaving a movie theater, a person notices that the sidewalk is now wet. If the person assumes it rained during the movie, the person is making a(n)

• hypothesis

• inference

• observation

• prediction

In a hypothesis, the ______variable is what is being tested, while the _______ variable is the one being measured in response

• control; dependent

• independent; control

• dependent; independent

• independent; dependent

What must be considered when designing a solution for a problem with technology?

• cost

• time

• materials

• all of the above

Ada and Elijah have decided to do an experiment testing how sunlight affects plant growth. The students choose the same type of plant s, soil, pots and amount of water they give the plants. They also make sure each plant is put in their designated area for the same amount of time each day. One plant is placed outside; one in front of a window that only gets light for 1/ 2 the day, and one in a closet. The students collect data every day for two weeks. Their results show that the plant outside grew the most and the plant in the closet had the least amount of growth.

What are the constant variables that Ada and Elijah used in their experiment?

• type of plants

• type of soil

• amount of light

• amount of growth

Five students each used the same ruler to measure the length of the same pencil. Their measurements were: 15.33 cm, 15.34 cm, 15.33 cm, 15.33 cm, 15.34 cm. The actual length of the pencil was 15.85 cm.

Were the measurements________?

• accurate

• precise

• both

• neither

Identify the IV and DV in the hypothesis:

If a player practices longer, then he will score more points in the game

Answer explanation

IV: practice time, DV: points scored