Enhancement Activity for Earth and Life Science

It is the earth system that includes all living organisms on earth, together with the dead organic matter produced by them.

• Hydrosphere

• Atmosphere

• Biosphere

• Lithosphere

Answer explanation

More than 70% of the atmosphere is made up of:

• Oxygen

• Carbon dioxide

• Methane

• Nitrogen

Answer explanation

The Paleozoic does not include the:

• Ordovician

• Jurassic

• Mississippian

• Permian

Answer explanation

Folding of rocks is most likely to happen when rocks undergo:

• tension

• compression

• shearing

• cooling

Answer explanation

Which of the following describes the processes by which sedimentary rock becomes metamorphic rock?

• weathering

• erosion

• intense heat and pressure

• cooling and solidifying

Answer explanation

The ______ contains center for heartbeat, breathing and blood pressure.

• cerebellum

• cerebrum

• spinal cord

• medulla oblongata

Answer explanation

It begins when pairs of sister chromatids align in the center of the cell.

• Anaphase

• Interphase

• Metaphase

• Prophase

Answer explanation

Which selection includes only accessory digestive organs?

• salivary glands, thyroid gland, pancreas, liver

• stomach, duodenum, pancreas, gallbladder

• gallbladder, liver, pancreas, salivary glands

• liver, thyroid gland, gallbladder, spleen

Answer explanation

Materials are exchanged between the blood and the surrounding tissues in the:

• arteries

• veins

• capillaries

• all of the above

Answer explanation

What is the force that causes air to flow into the lungs during inspiration and out of the lungs during expiration?

• muscle contraction

• surface tension

• diaphragm movements

• atmospheric pressure

Answer explanation