PSSA Prep Science #1

The diagram pictured is called a

• Punnett square

• pedigree chart

• flowchart

• cladogram

• 5

• 2

• 3

• 4

• The Rock Cycle

• The Water Cycle

• Plate Tectonics

• Chemical Changes

• must be dominant

• has a straight hairline

• has a peaked hairline

• may have AA offspring

Extinction of a species is most likely to occur as a result of

• evolution

• migration

• selective breeding

• environmental changes

All the populations living in one place form a

• community

• system

• habitat

• species

Based on evidence in the diagram, which statement best describes the practice of using wool to make clothing?

• Using wool is unsustainable because sheep require a lot of land.

• Using wool is sustainable because wool clothing can be thrown away.

• Using wool is unsustainable because recycling is not always possible for every item.

• Using wool is sustainable because wool clothing can benefit the land the sheep use.

• at stage 1

• at stage 2

• between stages 2 and 3

• between stages 3 and 4

• carrot, rabbit, and fox

• grain, bird, and owl

• fox, owl, and rabbit

• bird, mouse, and grasshopper

The table describes liquid X and liquid Y. A researcher pours 20.0 m L of each liquid into a test tube. As the two liquids mix, the test tube gets warmer and a yellow solid forms inside. The mass of the yellow solid is 40.0 g.

Which statement best explains what happened in the test tube?

• A chemical reaction occurred because a new substance was made.

• A chemical reaction occurred because the two liquids had different densities

• A chemical reaction did not occur, because a change in state is evidence of only a physical change and not a chemical change.

• A chemical reaction did not occur, because the mass of the liquids before mixing was equal to the mass of the yellow solid.