Year 8 T3 Week 2 Task

Students were investigating some properties of rocks. They wanted to compare the volumes of the rocks.

Which tool should the students use to accurately measure the volume of each rock?

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A scientist investigates the effect of carbon dioxide on plant height. The scientist grows plants in several closed containers. All the plants receive the same amounts of water and light, but the air in each container has a different amount of carbon dioxide. What is the independent variable in this experiment?

• the amount of carbon dioxide in each container

• the number of plants in each container

• the amount of water provided to the plants

• the height of each plant after a period of time

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A meteorologist recorded high temperatures for five days at three locations on land. The data are shown in the table below.

• Areas at the beach have the coolest temperatures

• Areas farther from the beach always have the warmest temperatures.

• Areas at the beach have the most stable temperatures.

• Areas farther from the beach always have the same weather as areas at the beach

The students concluded that the plants grown indoors grew faster because they received better quality light than the plants grown outdoors. Which is the most likely reason this conclusion may be flawed?

• The students measured the plants at different times.

• The students should have grown different types of plants.

• The growth of the plants in each set was affected by more than one factor.

• The outdoor plants grew faster than the indoor plants.

A student filled three identical cups with equal amounts of water. The student placed each cup in a room with a different air temperature. After a few days, the student compared the amounts of water remaining in each cup.

What cause-and-effect relationship does this investigation support?

• As evaporation decreases, air temperature decreases.

• As evaporation increases, air temperature increases.

• At higher air temperatures, more water evaporates.

• At higher air temperatures, less water evaporates.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Students in a science class plan to investigate a factor that affects the rate at which a pendulum swings.

In which way should the students manipulate the variables to get valid results in this investigation?

• use equal string lengths and different plumb bob masses

• use different string lengths and different plumb bob masses

• use equal string lengths and the same plumb bob shapes

• use different string lengths and different plumb bob shapes

Tags

NGSS.MS-PS2-2

A student hypothesized that a mouse would learn to run through a maze faster if food was at the end of the maze.

Which tool will best help the student determine if the speed of the mouse improved?

• metric ruler

• pan balance

• stop watch

• spring scale

The table shoes different types of pollination data for the fruit from one plant species.

Which graph best represents some of the data in the table?

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In a controlled experiment, how many variables can be worked with at a time? 

• one
• none
• two or more
• how ever many makes sense.

If plants are exposed to sunlight, then they will grow taller.

What part of the scientific method is this an example of?

• Aim

• Hypothesis

• Question

• Results