9 Weeks Science Test Review (AUG – OCT)

Students poured water and cooking oil into a beaker. The students then added a penny, a plastic paper clip and a cork to the beakers and recorded their observations. Which list puts the items in order from most dense to least dense?

• Cork, oil, plastic paper clip, water, penny

• Water, penny, oil, plastic paper clip, cork

• Penny, water, plastic paper clip, oil, cork

• Oil, penny, cork, plastic paper clip, water

Students use a circuit to investigate the properties of six objects. The buzzer makes a sound if an object completes the circuit. The circuit and observations are shown. Which objects are electrical insulators?

• Eraser, toothpick, cotton ball

• Toothpick, paper clip, safety pin

• Eraser, paper clip, safety pin

• Paper clip, safety pin, aluminum foil

Tags

TEKS.MATH.7.6C

TEKS.MATH.7.6H

A student places objects in a bucket of water to determine if they will float. Which set of items is less dense than water?

• F. Plastic paper clip, penny, and cork

• G. Toothpick, metal spoon, and plastic paper clip

• H. Metal spoon, vegetable oil, and penny

• J. Toothpick, cork, and vegetable oil

A student is classifying objects. Answering which question will provide the best evidence that an object is a metal?

• What is its mass?

• What is its physical state?

• Does it conduct thermal energy?

• How quickly does it dissolve in water?

A student poured equal amounts of water and cooking oil into a jar. The student placed a lid on the jar and shook the mixture for five seconds and then let the jar sit for ten minutes. The results of this investigation are shown. Which conclusion best compares a property of cooking oil and water shown in this investigation?

• Cooking oil is less dense than water.

• Water is less dense than cooking oil.

• Water dissolves in cooking oil.

• Cooking oil dissolves in water.

Based on their common properties, how should these objects be classified?

• Insulate thermal energy, Bendable, Attract to magnets

• Soluble in water, Attract to magnets, Conduct thermal energy

• Conduct electrical energy, Bendable, Soluble in water

• Conduct thermal energy, Conduct electrical energy, Not soluble in water

A table of different properties of four samples of matter is shown. Which conclusion can be made about the samples based on the table?

• Sample 1 is made of plastic

• Sample 2 is made of metal

• Sample 3 is attracted to magnets

• Sample 4 is less dense than water

A student compares the physical properties of the four objects shown. Which of these physical properties do all four objects have in common?

• They all have the same physical state and conduct electricity.

• They all conduct electricity and attract the same metal objects.

• They all attract the same metal objects and are not soluble in water.

• They all are not soluble in water and have the same physical state.

A group of students is given four small cubes of the same size and instructed to place them in a beaker of water. One cube floats to the surface of the water. Two of the cubes float in the middle of the beaker under the surface of the water. The last cube sinks to the bottom of the beaker. Which conclusion is best supported by what the students observed?

• A. Two of the four cubes are soluble in water.

• B. All four cubes have different masses.

• C. Each cube is made of a different type of solid material.

• D. One of the cubes is more dense than the other three.

Students investigates the physical properties of some substances. They draw a table to show how the substances can be grouped. The students need to complete the table with column headings.

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