DBA Review

Mrs. Gamboa’s Science class put a bucket of water outside. Every morning, they measured the temperature of the water. The graph shows how the temperature changed over a period of 10 days. Based on the information in the graph, on which day did the class likely see the water start changing to solid ice?

• Day 10

• Day 5

• Day 6

• Day 8

Based on evidence from the diagram and results of the experiment, what was most likely the purpose of the investigation?

• To demonstrate the density of materials.

• To demonstrate how materials are magnetically charged.

• To classify materials based on their ability to conduct thermal energy.

• To classify materials based on their ability to conduct electrical energy.

Which statement describes what would happen if the filament in one bulb burned out and no longer conducted electricity?

• A) The other two bulbs in the circuit would glow brighter.

• B) The other two bulbs in the circuit would no longer glow.

• C) The other two bulbs in the circuit would start blinking on and off.

• D) The other two bulbs in the circuit would glow but would be dimmer.

Which statement BEST describes the results shown in Anagha’s diagram?

• A) Light is absorbed when it enters the glass block and reflected when it exits the glass block.

• B) Light is refracted before it enters the glass block and is reflected when it exits the glass block.

• C) Light is refracted when it enters the glass block and is absorbed in the middle of the glass block.

• D) Light is refracted two times, once when it enters the glass block and once when it exits the glass block.

Which of these landforms forms in a way similar to an alluvial fan?

• A) A sand dune

• B) A plateau

• C) A valley

• D) A delta

What causes an earthquake?

• Strong wind

• Rainfall

• Movement of tectonic plates

• Volcanic eruption

A student said, “The weather is much cooler today than it was a year ago on this day. This proves that the climate is getting cooler.” Why is the student’s observation not a proof of climate change?

• Climate is a combination of temperature and air pressure for a day.

• Climate is a prediction of next week’s temperatures rather than today’s temperature.

• Climate is the average of weather over years rather than a single year.

• Climate is an average of daytime and nighttime weather conditions for a day.

Which question can best be answered using this data?

• How much of the energy people use comes from fossil fuels?

• Is it less expensive for people to use coal or natural gas?

• What are some of the other nonrenewable energy resources?

• What are the main uses of renewable energy sources?

Which statement below describes the main relationship between pocket gophers and the soil?

• The pocket gophers make oxygen for the soil.

• The pocket gophers cause the soil to erode.

• The soil provides shelter and protection for the pocket gophers.

• The soil is the food for the pocket gophers.

Which statement describes a balanced ecosystem?

• It has a limited number of biotic factors.

• It has a stable and diverse community of biotic and abiotic factors.

• It is dominated by abiotic factors.

• It experiences constant changes in abiotic and biotic factors.