3rd 9 Weeks DCA

Which human activity MOST DIRECTLY affects the environment in a negative way?

• mining

• planting trees

• recycling

• walking to school

Study the diagram of a food web.

If there is an increase in the fish population, which population of organisms would decrease MOST QUICKLY?

• algae

• bird

• frog

• turtle

A student conducts an activity to find how the distance traveled by an object changed with the amount of force applied to it.  The student pushes a marble with varying forces on the same surface and records the distances the marble travels before coming to rest.  The table shows the forces applied on the marble in different trials.

In which trial would the marble MOST LIKELY travel the LEAST distance?

• Trial 1

• Trial 2

• Trial 3

• Trial 4

Which action can a student take to make orange juice less concentrated?

• Mix the orange juice with water.

• Cool down the orange juice in the freezer.

• Mix two cans of orange juice together.

• Heat the orange juice until it comes to a boil.

A local government allows hunters to hunt three adult male deer in a year.  What would be the effect if hunters count hunt more than three adult male in a year?

• The population of organisms the deer eat would decrease

• The populations of organisms the deer eat would remain the same.

• The populations of organisms the deer eat would increase.

• The populations of organisms the deer eat would increase suddenly and then decrease.

Aristotle's model of the solar system had Earth at its center.  After many years, Galileo observed the phases of Venus from Earth and created a different model of the solar system, as shown in the image.

Based on Galileo's observations, what changed in human understanding of the solar system?

• All planets revolve in circular paths.

• Venus revolves around Earth.

• The Sun is the center of the Solar System.

• Earth is not a part of the Solar System.

Which activity would result in the formation of a new compound?

• adding sugar to water

• baking a flour-water mixture for a cake

• cutting lettuce for a salad

• stirring chocolate syrup in milk

A recycling center has a box containing a mix of paper, plastic, and metal.  The different materials need to be sorted.

Which material(s) can magnets help sort?

• metal

• paper

• paper and plastic

• plastic and metal

The data shows the yearly rainfall in four different biomes, P-S.

Which choice CORRECTLY pairs the biome with its name and a type of organism that lives there?

• P:  grassland and ferns

• Q:  desert and cacti

• R:  rainforest and monkeys

• S:  deciduous forest and deer

A student is given two containers filled with two substances, A and B.

The student classifies substance A as a solid and substance B as a liquid.  What evidence supports the classifications?

• Substance A has a greater mass than substance B.

• Substance B takes up more volume than substance A.

• Substance B has a rigid structure, and substance A flows.

• Substance A has a fixed shape, and substance B takes the shape of the container.