Exploring Science: Body and Matter

What is the main function of the circulatory system?

• To regulate body temperature and maintain homeostasis.

• To filter and remove toxins from the bloodstream.

• To produce hormones that control metabolism.

• To transport blood and facilitate the exchange of oxygen, nutrients, and waste.

Which organ is responsible for pumping blood in the body?

• Lungs

• Heart

• Kidneys

• Liver

What are the three main types of blood vessels?

• arteries, veins, lymphatics

• veins, arteries, platelets

• capillaries, arteries, nerves

• arteries, veins, capillaries

What is the largest organ in the human body?

• liver

• heart

• lungs

• skin

How many bones are in the adult human body?

• 204

• 206

• 198

• 210

What is the primary function of the respiratory system?

• To regulate body temperature through sweating.

• To circulate blood throughout the body.

• To digest food and absorb nutrients.

• To facilitate gas exchange (oxygen and carbon dioxide) between the body and the environment.

What gas do we inhale that is essential for life?

• Hydrogen

• Nitrogen

• Oxygen

• Carbon Dioxide

What are the three states of matter?

• plasma, vapor, foam

• gas, liquid, crystal

• solid, liquid, gas

• solid, liquid, plasma

What state of matter has a definite shape and volume?

• Plasma

• Liquid

• Solid

• Gas

What happens to the molecules in a solid when it is heated?

• The molecules in a solid move freely and do not change position when heated.

• The molecules in a solid expand and become liquid immediately upon heating.

• The molecules in a solid lose all energy and become stationary when heated.

• The molecules in a solid vibrate more and may eventually break free from their fixed positions when heated.