5th grade Science STAAR REVIEW

The model above shows layers of sediment on an ocean floor. Which of the following can explain how these layers can become rock over many years?

• sand in the sediment melts and turns into rock

• weight of the water compacts the sediment into rock

• changing water temperatures turn sand in the sediment into rock

• pollution caused by humans turns sediment into rock

Students make a model to show first step in formation of sedimentary rock. They pour 2 cm of light colored sand into a clear plastic box. They add 1 cm of gravel. Finally they pour 2 cm of dark colored sand on top of gravel. Which characteristic of sedimentary rock does this model show?

• Sedimentary rock is made of layers

• Sedimentary rock is made of cemented bits of rock

• Sedimentary rock is often limestone

• Sedimentary rock is often common in Texas.

A group of students built the circuit shown here. The lightbulb does not glow. Which statement explains this observation? (5.6B)

• The battery is not charged.

• The lightbulb is not part of a complete circuit.

• The circuit does not have a switch.

• The bell uses most of the energy from the battery.

A food web for some organisms in an African rain forest is shown below. Which organisms in this food web eat only consumers? (5.9B)

• Okapis

• Civets

• Leopards

• Gorillas

Which of these is a behavior that a person learns rather than inherited? (5.10B)

• Swallowing a sweet liquid

• Having a pleasant dream

• Digesting a chocolate-covered strawberry

• Identifying the scent of a rose

Some facts about birds called Cattle Egrets are listed below. Which of these facts best describes how these birds depends on other animals to survive?

• Fact 1

• Fact 2

• Fact 3

• Fact 4

A canyon with tall, vertical sides is shown. Which of the following most likely led to the formation of this canyon?

• Rapidly moving water

• A hurricane

• Burrowing animals

• Volcanic activity

Crayfish live in water and often hide under rocks or plants. They come out to look for food and will eat both plants and animals. Which of these is a trait that a crayfish most likely inherits from its parents? (5.10B)

• The average distance it travels each day

• The number of legs it has

• The amount of food it eats each day

• The type of plants in its habitat

The picture shows a series circuit with three lit bulbs. How many of the bulbs will remain lit if the wire is cut at the point shown by the arrow? (5.6B)

• 0

• 1

• 2

• 3

Which of these is the best conductor of electricity? (5.5A)

• Glass rod

• Cotton string

• Plastic tubing

• Copper penny