Unit 3 Bellringer

A mouse’s rate of carbon dioxide output increased. Which of the following most likely happened?

• The mouse went to sleep.

• The mouse ate some food.

• The mouse started running.

• The mouse detected an odor.

Here is a list of supplies available in a laboratory.

- four flasks with stoppers

- floodlight

- tap water

- graduated cylinders

- small aquarium plants

- four small fish

- bromthymol blue (a chemical indicator that changes color from blue to yellow as the level of carbon dioxide in a solution increases)

The class sets up an experiment with the four flasks as shown. Which flasks contain organisms undergoing cellular respiration?

• Flask 1, 2, and 3

• Flask 1 and 3

• Flask 2 and 3

• None

Tags

NGSS.MS-LS1-7

Here is a list of supplies available in a laboratory.

- four flasks with stoppers

- floodlight

- tap water

- graduated cylinders

- small aquarium plants

- four small fish

- bromthymol blue (a chemical indicator that changes color from blue to yellow as the level of carbon dioxide in a solution increases)

The class sets up an experiment with the four flasks as shown. Which flasks contain organisms undergoing photosynthesis?

• Flask 1, 2, and 3

• Flask 1 and 3

• Flask 2 and 3

• None

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Here is a list of supplies available in a laboratory.

- four flasks with stoppers

- floodlight

- tap water

- graduated cylinders

- small aquarium plants

- four small fish

- bromthymol blue (a chemical indicator that changes color from blue to yellow as the level of carbon dioxide in a solution increases)

The class sets up an experiment with the four flasks as shown. Which flask should change from blue to yellow most quickly?

• Flask 1

• Flask 2

• Flask 3

• Flask 4

Tags

NGSS.MS-LS2-3

NGSS.MS-PS1-2

A student wants to shorten the ripening time for tomatoes. He predicts that the more water the seedlings receive, the faster the tomatoes will ripen. He grows 20 tomato plants in a garden in full sunlight that has dry soil, and 20 tomato plants in the same garden where there is more moisture in the soil. He records the time it takes for fruit to develop and ripen on the plants in each location. What is test variable (independent variable) in this experiment?

• The time it takes for the fruit to develop and ripen.

• The tomato seedlings at different stages of development.

• The amount of sunlight each plant receives.

• The amount of moisture each plant receives.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

The graph shows the results of a photosynthesis investigation on algae. Which questions was the scientist most likely studying?

• Why is the rate of photosynthesis different in high light intensity from low light intensity?

• Why does increasing the light intensity increase the rate of photosynthesis in algae?

• How is the rate of photosynthesis in algae at two light intensities affected by different temperatures?

• How does increasing the rate of photosynthesis in algae change its temperature?

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3