General Science

1.		Which of the following is a type of chemical reaction in which oxygen combines with another substance?

Combustion

Oxidation

Reduction

Precipitation

2.		Which of the following is a property of bases?

They have a pH less than 7

They taste sour

They react with acids to form salts and water

They have a slippery feel

3.		What is the smallest unit of matter that retains the properties of an element?

Atom

Molecule

Cell

Nucleus

4.		Which of the following is the largest organ in the human body?

Liver

Brain

Skin

Heart

5.		Which of the following is a type of fossil fuel?

Wind

Solar

Coal

Hydroelectric

6.		Which of the following is a type of simple machine?

Lever

Electron

Neutron

Proton

7.		Which of the following is NOT a type of muscle tissue?

Skeletal

Cardiac

Smooth

Nerve

8.		Which of the following is a type of rock that forms from cooled and solidified magma or lava?

Sedimentary rock

Metamorphic rock

Igneous rock

Fossil rock

9.		Which of the following is a type of cell that is responsible for carrying oxygen throughout the body?

Red blood cell

White blood cell

Nerve cell

Muscle cell

10.		What is the basic unit of heredity?

Protein

Gene

Chromosome

Enzyme