MCAS Science Review

2019 MCAS Part 1 Review

Let's start practicing!

Multiple Choice

After the magnet is removed, only a colorless liquid remains in the beaker. Which three samples did the teacher most likely mix together?

• A samples 1, 2, and 5

• B samples 1, 2, and 3

• C samples 2, 3, and 4

• D samples 3, 4, and 5

Magnetism

• If something is magnetic, the magnet will pull objects across a distance

• Since sample 3 was magnetic, when the teacher stirred the sample with a magnet, the magnet attracted sample 3 and removed it from the liquid.

Solubility

Solubulity means does it dissolve in another substance

If a substance can dissolve into another substance, it is hard to separate from the other substance.

Multiple Choice

Which of the following should the students observe or measure to find out how well the water filter works?

• how clear the filtered water is

• how much water needs to be filtered

• the length and width of the water filter

• the amount of sand used to make the water filter

Water Filters

Water filters clean and purify water. The purpose is to remove bad things from the water. This picture shows untreated vs. treated water.

Water Filters

• To see if a water filter works, you would see purified and clean water.

• As can be seen in this picture, the treated water is clear and purified. That is how we know it worked.

Multiple Choice

The vegetable plants in the school garden used photosynthesis to grow. Which of the following describes how the vegetable plants use photosynthesis to grow?

• A In photosynthesis, vegetable plants use the energy from sunlight to convert air and water into sugar.

• B In photosynthesis, vegetable plants use the energy from sugar to convert sunlight into air and water.

• C In photosynthesis, vegetable plants use the energy from air and water to convert sunlight into sugar.

• D In photosynthesis, vegetable plants use the energy from sunlight to convert sugar into air and water.

Photosynthesis

Photosynthesis is when plants take in energy and carbon dioxide and give off oxygen and sugar!

Multiple Choice

The students added the same amount and type of vegetable waste to each composter. After several weeks, they noticed that the waste in composter 2 was breaking down faster than the waste in composter 1.

Which of the following changes could the students make to composter 1 so that waste breaks down more quickly?

• A. drill many small holes in each side

• B. cover the top with a lid made out of wire mesh

• C. cover the top with a lid made out of clear plastic

• D. replace the wooden sides with thick plastic sides

Question 3

The question is asking us how to make composter 1 as effective as composter 2.

Composter 2 looks different from composter one, as it has mesh on the side, where as composter 1 does not.

To make composter 1 more like composter 2, you must drill holes on the side.

Annotate the problem.

Multiple Choice

Bacteria play an important role in the movement of matter in the students’ model. Which of the following describes the role of bacteria in a composter?

• Bacteria in a composter are producers because they produce sugars.

• Bacteria in a composter are composers because they produce sugars.

• Bacteria in a composter are consumers because they recycle materials.

• Bacteria in a composter are decomposers because they recycle materials.

Multiple Choice

A town is having a water shortage, and the people in the town have been asked to reduce their use of the town’s water supply. A gardener wants to continue to water plants in a garden.

Which of the following would be the most effective way to water the plants and still reduce water use?

• use soapy water

• use filtered water

• use water from water bottles sold in stores

• use water from rain collected in large containers

Multiple Choice

The fossils in which rock layer are the oldest?

• Layer W, because the fossils are in the top layer

• Layer X, because the fossils were formed from ocean organisms

• Layer Y, because the fossils are in the bottom layer

Multiple Choice

An engineer is testing different types of pervious concrete to use in a new parking area. Pervious concrete is a special kind of concrete that can help reduce flooding by allowing rainwater to pass through and soak into the ground.

Which of the following should the engineer measure to see how well a type of pervious concrete will reduce flooding?

• the weight of 10 cubic meters of the concrete

• the strength of a 15-centimeter layer of the concrete

• the amount of water needed to mix a cubic meter of the concrete

• D the number of liters of water per minute that can move through the concrete

Pervious Concrete

Pervious Concrete is so special because it can reduce flooding by allowing water to pass through it.

In order to see that the concrete is effective, we would want to see the number of liters of water per minute that can move through the concrete

Multiple Choice

What question is the student most likely trying to answer from this setup?

• How far can the magnets pull the car?

• How far can the magnets push the car?

• Is a force applied by the car to the magnet on the car?

• Is the magnet on the block attracted to or repelled by the car?

Magnets attract or repel

As seen in the picture, like poles repel each other, which means they are pushing away from each other.

The question is asking us to find out how far did the magnet PUSH the car.

Multiple Choice

Which region is most likely a tropical rainforest?

• A. region W

• B. region X

• C. region Y

• D. region Z