PLTW 2.1.2

What is the primary function of the respiratory system in humans?

• To transport oxygen to cells and remove carbon dioxide

• To digest food and absorb nutrients

• To circulate blood throughout the body

• To protect against infections

Which of the following is a chemical change?

• Melting of ice

• Boiling of water

• Rusting of iron

• Breaking of glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the chemical formula for table salt?

Which planet is known as the Red Planet?

• Earth

• Mars

• Jupiter

• Venus

What is the process by which plants make their food using sunlight?

• Respiration

• Photosynthesis

• Transpiration

• Fermentation

Tags

NGSS.MS-LS1-6

Which of the following is a renewable source of energy?

• Coal

• Natural Gas

• Solar Energy

• Nuclear Energy

What is the basic unit of life?

• Organ

• Tissue

• Cell

• Organism

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Which gas is most abundant in the Earth's atmosphere?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Hydrogen

What is the acceleration due to gravity on Earth?

Which of the following elements is a noble gas?

• Oxygen

• Nitrogen

• Helium

• Hydrogen