Science Unified Practice

Draw Air Pollution

Select TWO statements that describe the role of producers in the forest.

• Producers provide an energy source for consumers.

• Producers provide an energy source for decomposers.

• Producers use solar energy to conduct photosynthesis.

• Producers provide an energy source for other producers.

• Producers use organic matter to conduct photosynthesis.

Select all the qualities of quantitative observations

• can be expressed in numbers

• usually made with the help of tools

• can be a verbal description, such as "red"

• usually reported with units, such as feet, celsius or watts

An object is is placed into 45 mL of water. The water rises to 48 mL. What is the volume of the object?

• 3 mL

• 93mL

• 8 mL

• 83 mL

Look at the diagram. What do you call the small pieces of rocks that are broken down due to weathering and erosion and will eventually become sedimentary rock?

• magma

• lava

• sediments

• cements

Frank has an eraser. It has a mass of 4 g, and a volume of 2 cm³. What is its density?

• 8 g/cm³
• 2 g/cm³
• 1/2 g/cm³
• 24 g/cm³

Invasive species alter the ecosystem when they___________in number quickly, this leads to __________ food for the native species.

• increase, less

• decline, more

If I give more water to the cucumber plant, then it will grow quickly. This is an example of a(n) _____________.

• Inference

• Hypothesis

• Observation

• Explanation

Which of the following groups is NOT a good conductor of electricity?

• tweezer, balloon, ten dirham bill

• clip, tweezer, aluminium foil

• Paper clip, screw, spoon

In a well designed experiment, you should change how many variables?

• only one
• no more than two
• none at all
• as many as are needed