Scientific Reasoning Quiz

We have a glass of milk and an empty bowl. We pour the milk from the glass into the bowl. What can we conclude from the information?

• Both the Volume and the shape of the milk changes

• The volume of milk changes but shape is the same

• The shape of the milk changes, and the volume is the same

• The milk maintains its shape and volume

You have a small glass with a marble inside and an empty, larger glass. When you move the marble from the small glass into the larger one, what happens to the marble?

• The volume and shape of the marble change.

• The volume of the marble changes, but the shape stays the same.

• The marble changes shape, but the volume stays the same.

• The marble keeps its volume and shape.

Transpiration is the process where plants lose water through their leaves. In an experiment, Grade 7 learners placed plants in graduated cylinders with water and paraffinic oil. One cylinder had more leaves than the other, and both were kept in a bright room with a running fan. What can we conclude from this experiment?

• The size of the stems affects transpiration.

• More leaves increase transpiration.

• Paraffinic oil stops transpiration.

• The amount of water affects transpiration.

(a) Suppose you place two beakers labeled A and B, each with a narrow tube containing red-colored water. In beaker A, there is hot water with a narrow tube containing red colored water placed inside. In beaker B, there is cold water with a narrow tube containing red colored water. The level of contains of red colored water in the narrow tube placed in the beaker with hot water rose, while the level of red colored water in the narrow tube placed in the beaker with cold water remained the same. What does this experiment show?

• Temperature affects water level.

• Cold water causes a water level rise.

• Hot water causes the red water fall.

• Hot water boils the red-colored water.

(b). Because Heated liquids become denser level of cold liquids rises Heated liquids become less dense Cold liquids become denser

• Heated liquids become denser

• level of cold liquids rises

• Heated liquids become less dense

• Cold liquids become denser

A 7th-grade class has 18 students. During lunchtime, the teacher brought in 12 bottles of orange juice and then filled all the students' cups (no juice remained). How many cups can be filled with 16 bottles of orange juice?

• 20

• 24

• 28

• 30

The students are shown a capped bottle filled with water. Inside the bottle is an eyedropper floating just beneath the surface. The eyedropper is partially filled with water and partially filled with air. When the water bottle is squeezed, the eyedropper sinks to the bottom but will not turn over. When the bottle is released, the eyedropper floats to the top. Now, suppose the same experiment is conducted using oil. What happens to the eyedropper when the bottle is squeezed?

• Upwards tilting

• Float on the surface

• Downward tilting

• Sinks to the bottom

How could you explain what happens to the eyedropper inside oil when the bottle is squeezed? Click the correct answer

• Oil is less dense; the eyedropper tilts

• The eyedropper will float due to pressure

• Volume decreases; the eyedropper floats

• The eyedropper is less buoyant and sinks

Jane wanted to investigate whether the water temperature affects the amount of sugar dissolved in it. She poured an equal amount of water into two identical cups. She then heated one cup to 30°C and the other to 70°C. She stirred one sugar cube into each cup until the cube dissolved. She repeated this process until the cubes did not dissolve anymore. At the end of the experiment, she recorded the number of sugar cubes that dissolved in each cup. Based on her observations, click on the statement that describes the relationship between water temperature and the amount of sugar that dissolves.

• At 30 C, more sugar cubes dissolve

• The sugar cubes dissolve in hot water

• At 70 C, more sugar cubes dissolve

• The amount of sugar dissolved is less

Suppose Jane conducted the same experiment using a smaller sugar crystal, predict at what temperature the crystals would fully dissolve in water.

• 20 degrees

• 30 degrees

• 40 degrees

• 50 degree