Science Final Test review

What organ brings oxygen into the blood?

• Heart

• Lungs

• Brain

• Kidneys

Which type of blood vessel carries blood away from the heart?

• Vein

• Artery

• Capillary

• Atrium

What happens to the heart rate during exercise?

• It stays the same

• It decreases

• It increases

• It stops

Blood that is rich in oxygen flows from the:

• Lungs to the brain

• Heart to all parts of the body

• Veins to the heart

• Lungs to the stomach

Which system removes waste like carbon dioxide from the body?

• Digestive system

• Respiratory system

• Circulatory system

• Nervous system

What type of change is usually reversible?

• Chemical

• Physical

• Nuclear

• Thermal

Dissolving salt in water is an example of:

• Chemical change

• Physical change

• Nuclear reaction

• None of the above

Which factor can speed up the process of dissolving?

• Adding more solute

• Lowering the temperature

• Increasing the temperature

• Shaking the container

A sign that a chemical reaction has taken place includes:

• Dissolving

• Crumpling

• A gas being produced

• None of the above

In a chemical reaction, the original substances are called:

• Elements

• Solvents

• Products

• Reactants