Science Nafs diagnostic test 2

Which unit is used for density?

• grams

• liters

• cubic centimeters

• grams per cubic centimeters

The place of an element in the modern periodic table is determined by its _____.

• atomic number

• atomic mass

• density

• chemical activity

Which of the following elements is the most common element in the universe?

• hydrogen

• helium

• nitrogen

• oxygen

Which of the following can NOT be used to separate heterogeneous mixtures?

• a strainer

• a magnet

• a scoop

• a microscope

Three examples of physical change are _____.

• boiling water, a nail rusting, a melting candle

• a pond freezing, breaking glass, a burning candle

• melting ice, mowing the lawn, carving a statue

• applying lipstick, making lemonade, baking bread

what turns litmus paper to blue?

• acids

• bases

• salts

• all

Which of the following is not a benefit of bacteria:

• Energy production.

• Starch production.

• Food industry.

• Water production.

What is produced when mitochondria stop working in cells?

• The size increases.

• The cell will die.

• Don't be affected.

• Replace what is lost.

What process is associated with the presence of the green pigment chlorophyll?

• Cellular respiration.

• Digestion.

• Photosynthesis.

• Active transport.

When snakes are killed in an agricultural field, what type of population increases?

• Agricultural crops.

• Field mice.

• Migrated birds.

• Group of cows.