Forces
What type of force is magnetic force?
Non-contact force
What is the smallest unit of life?
Cell
What is a chemical reaction?
Chemical reactions make new chemicals
What are light and sound?
Energy
Who was the first discoverer of force in modern physics?
Issac Newton
What is the unit of force?
Newton (N)
What is the cell structure that is where most chemical reactions happen？
Cytoplasm
What is the name of HCl?
Hydrochloric acid
Can you hear an explosion in space?
No
Why are stem cells important?
Can turn into different cell types
Equal forces result in what?
Equilibrium
Which plant organ makes food by photosynthesis?
Leaves
Is the melting of ice an exothermic or endothermic reaction?
Endothermic (absorbs heat)
What is the speed of light?
299,792 km/s in a vaccum
Why does your voice sound different in a recording?
You hear it the way others hear it, not through bone vibrations
What is the gravity of a 34kg object on Earth?
340 N
Name four human organ systems
Cardiovascular, digestive, endocrine, immune, integumentary, muscular, nervous, reproductive, respiratory, skeletal, and urinary systemsCell wall
Balance this equation:
Fe+O2→Fe2O3
4Fe+3O2→2Fe2O3
What does 1 hertz mean?
1 vibration per second
How long does it take light from the Sun to reach Earth?
8 minutes
What shape helps reduce resistance from air or water?
Streamlined shape
Name three cell structures that are found predominantly in plant cells
Cell wall, chloroplasts, and large central vacuole
Explain the chemical reactions behind the Pharaoh's Snake experiment
Sugar → carbon foam (black snake)
Baking soda → carbon dioxide (expansion)
Explain the difference between reflection and refraction
Reflection = light bounces
Refraction = light bends
Which element is known as the building block of life?
Carbon