Reproductive System
Which male reproductive organ produces sperm?
The testes
Newton’s First Law says that an object at rest will stay at rest unless acted on by what?
An unbalanced force
What is the main gas that humans exhale?
Carbon dioxide
What organ controls the nervous system?
The brain
What is a substance made of only one type of particle called?
Name one physical change that can happen during puberty.
growth spurts, body hair, voice changes, acne, body odor, breast development.
What is inertia?
The tendency of an object to resist changes in motion.
What part of the human body contains the most bones?
The Hands
What long bundle of nerves carries messages between the brain and the body?
The spinal cord
What type of mixture looks the same throughout?
Homogenous Mixture
Which female reproductive organ produces eggs?
The ovaries
According to Newton’s Second Law, what happens when more force is applied to an object?
The object accelerates more/moves faster.
What is the process of water turning into vapor called?
Evaporation
What are the tiny cells that carry messages through the nervous system called?
Neurons
Is salt water a homogeneous or heterogeneous mixture?
Homogenous Mixture
Which body system controls many of the changes that happen during puberty?
The endocrine / hormonal system
Which of Newton’s Laws best explains why wearing a seatbelt is important?
Newton’s First Law (inertia).
How many chromosomes does a human being have?
46 individual
23 pairs
What part of the brain controls our fight ot flight response?
The Amygdala
Why is air considered a mixture instead of a pure substance?
Because it contains different gases mixed together.
Which gland in the brain helps start puberty by releasing hormones?
The pituitary gland.
A soccer ball and a bowling ball are kicked with the same force. Which one will accelerate more, and why?
The soccer ball, because it has less mass.
Which subatomic particle is responsible for electricity?
Electron
What does REM stand for?
Example: REM cycles are very important for a good nights sleep.
Rapid Eye Movement
A student mixes sand and iron filings together. What type of mixture is this, and how could the iron be separated?
A heterogeneous mixture
the iron can be removed with a magnet.