SAT 10 Grade 8 Science Practice Test_3

Which layer of the Earth is composed mainly of solid iron and nickel?

• Crust

• Mantle

• Outer core

• Inner core

What is the main function of red blood cells?

• To fight infections

• To carry oxygen

• To digest food

• To produce energy

Photosynthesis occurs in which part of the plant cell?

• Mitochondria

• Chloroplast

• Nucleus

• Ribosome

The process of water evaporating from plant leaves is called:

• Precipitation

• Condensation

• Transpiration

• Evaporation

What is the primary cause of earthquakes?

• Erosion

• Volcanic eruptions

• Movement of tectonic plates

• Ocean currents

The basic unit of all living organisms is the:

• Tissue

• Organ

• Cell

• Atom

Which of the following best describes the role of chlorophyll?

• Absorbs light energy for photosynthesis

• Protects cells from toxins

• Stores energy in plants

• Provides nutrients to plants

What gas is released during photosynthesis?

• Carbon dioxide

• Nitrogen

• Oxygen

• Hydrogen

Which organ system removes waste products from the body?

• Respiratory system

• Digestive system

• Circulatory system

• Excretory system

Which of the following best describes an igneous rock?

• Formed by cooling and solidification of lava or magma

• Formed by weathering and erosion

• Formed by compression of sediment

• Formed by chemical precipitation