Science 6 midterm Study Guide(24-25)

A beaker is full of water. A piece of copper and some oil are placed in the beaker. The COPPER SINKS TO THE BOTTOM of the water. The OIL FLOATS ON TOP of the water. What is the order of the three substances FROM LOWEST TO HIGHEST DENSITY?

• oil, water, copper
• water, oil, copper
• copper, oil, water
• water, copper, oil

Which of the following are NOT examples of a chemical change? Select ALL that apply.

• Melting ice

• Burning wood
• Rusting iron
• dissolving sugar in water

Tags

NGSS.MS-PS1-2

which of the following is an example of a physical change?

• burning wood

• tearing paper

• Melting a crayon

• making coffee

What is a chemical change?

• A chemical change involves only the rearrangement of atoms without forming new substances.
• A chemical change is a physical alteration of a substance.
• A chemical change is a process where substances combine or break apart to form new substances.
• A chemical change is a process that only occurs at high temperatures.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the basic building block of life?

• Cell
• Tissue
• Molecule
• Atom

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Which of the following statements correctly describes the atomic structure of solids, liquids, and

gases? (Select THREE correct answers)

• In gases, particles or molecules are spread far apart and move freely.

• In solids, particles or molecules are closely packed in a fixed arrangement.

• In liquids, particles or molecules are closely packed but can move past one another.

Tags

NGSS.MS-PS1-4

When observing the transition from solid to liquid, what pattern can be identified in particle

movement?

• Particles maintain the same speed and arrangement

• Particles move faster and begin to slide past each other

• Particles move slower and become more fixed

• Particles spread out and move freely

Tags

NGSS.MS-PS1-4

1. A student is given a sample of liquid that appears uniform throughout. Upon evaporation,

the student recovers salt crystals.

Which type of mixture was the student investigating?

• A suspension of sand in water.
• A colloid of milk in water.
• A heterogeneous mixture of oil and vinegar.
• homogeneous mixture of salt in water.

Another term for homogeneous mixture is_________.

• solution
• colloid
• suspension
• emulsion

To investigate different types of mixtures, we can look at their __________ properties.

• chemical
• biological

• physical

• emotional