2nd benchmark review

When someone uses something again, it is called _________________.

• reduce

• reuse

• recycle

When someone cuts back on the amount of waste they use, they are _____________________-.

• reducing

• reusing

• recycling

When waste is broken down to make something new, it is called ____________________.

• reducing

• reusing

• recycling

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what is the dependent variable?

• Type of plant
• Water, apple juice, milk
• Plant growth

Mr. S set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the independent variable.

• Distance traveled by the ball
• Height of the ramp
• Mass of the ball

Before starting an investigation or lab procedure, you should

• try an experiment on your own

• open all containers and packages

• read all directions and make sure you understand them

• handle all the equipment to become familiar with it

If electrical equipment has a cord or plug that appears damaged, you should

• unplug the equipment by pulling on the cord

• let the cord hang over the side of a counter or table

• tell your teacher about the problem immediately

• wrap tape around the cord to repair it

The positively charged particles of an atom are the ________.

• electrons
• protons
• neutrons
• protons & neutrons

What does the nucleus of an atom contain?

• Electrons and neutrons
• Protons and neutrons
• Neutrinos and positrons
• DNA and RN

The subatomic particles that make up an atom.

• solid, liquid, gas

• electrons, protons, nucleus

• energy, protons, nucleus

• electrons, protons, neutrons