Chemistry
What is the pH of a neutral solution?
7
What organelle is responsible for producing energy in cells?
Mitochondria
What causes day and night?
Earth's rotation
What is the formula for speed?
Speed = distance / time
What is the independent variable?
The variable you change
What type of bond involves sharing electrons?
Covalent
What process do plants use to make glucose? What is the formula for this?
Photosynthesis
6CO2+6H2O+light→C6H12O6+6O2
What causes seasons?
Earth's tilt
What happens to acceleration if mass increases (same force)?
Acceleration decreases
What is the dependent variable?
The variable you measure
How many valence electrons does Carbon have? What is an atom that will behave similarly to Carbon?
4
Si, Ge, Sn, etc.
What is the role of enzymes
Speed up chemical reactions (lower activation energy)
What gas is most responsible for the greenhouse effect?
Carbon dioxide (CO₂)
What force opposes motion?
Friction
What does a positive slope indicate?
As one variable increases, the other increases
What happens to reaction rate when temperature increases?
It increases
What happens to a population when resources become limited?
Growth slows or stops (carrying capacity)
What is one piece of evidence for climate change?
Rising temperatures, melting ice, increasing CO₂
What happens to kinetic energy as speed increases?
What is the formula for potential energy?
KE increases
PE = mgh
What does a negative slope indicate?
As one variable increases, the other decreases
Look at the reversible reaction below. What will happen to the concentration (amount) of chemical A if we add more B?
A ⇌ B + C
The concentration will increase
After wolves are reintroduced to a forest, deer decrease, grass increases, and all populations become more stable over time. What is the most likely reason?
The ecosystem reaches a new stable balance through predator-prey interactions
Complete the sentence: Planets that are further from their star have a _________ orbital period than those that are closer.
Longer
Two objects are pushed with the same force. Object A has twice the mass of Object B. How do their accelerations compare?
Object B accelerates twice as much as Object A
A student tests how fertilizer affects plant growth. All plants receive the same water, soil, and light, but different amounts of fertilizer. After 3 weeks, plant height is measured. What are the controls?
water, soil, and light