Biology
Cell Cycle, Mitosis, and Differentiation: In which phase of mitosis do sister chromatids separate and move to opposite poles?
Anaphase
Valence electrons in Mg →
2
A car speeds up from 0 to 20 m/s in 4 s. What is its acceleration?
5 m/s2
What is the hardness of quartz on the Mohs scale?
8
Viruses and Prokaryotes: Which viral cycle inserts the viral DNA into the host chromosome, where it can stay dormant?
lysogenic
A chlorine atom has 17 protons and 18 neutrons. What is its mass number?
35
A 1,200 kg car accelerates at 3 m/s². What net force acts on it?
3600 N
The Rock Cycle: Which type of rock forms when magma cools slowly beneath Earth's surface, producing large crystals?
Intrusive igneous rock (e.g., granite)
In photosynthesis, how many CO₂ molecules are needed to make one glucose molecule?
6
Acids, Bases, and pH: What is the pH of a solution with [OH⁻] = 1 × 10⁻⁴ M at 25 °C?
10
Light, Refraction, and Electricity: Resistors of 2 Ω, 3 Ω and 5 Ω are connected in series to a 20 V battery. What current flows?
2A
Marble is a metamorphic rock. What is its parent rock?
lime stone
Interactions in Ecosystems: Which type of symbiosis benefits one species while the other is neither helped nor harmed?
Commensalism
Analyzing Nuclear Reactions: A radioactive sample has a half-life of 8 days. What fraction is left after 24 days?
1/8
Systems of Matter and Energy: A 2 kg ball is held 5 m above the ground. What is its gravitational potential energy? (g = 10 m/s²)
100 J
: A coal power plant turns 1,000 J of chemical energy into 350 J of electrical energy. What is its efficiency?
35 /
A population grows logistically with a carrying capacity of 800. At what population size is its growth rate fastest?
400
Properties of Compounds and Solutions: How many grams of NaCl are needed to make 2 L of a 0.5 M solution? (molar mass = 58.5 g/mol)
58.5
What is the momentum of a 1,500 kg car moving at 20 m/s?
30,000 kg·m/s
What is the process by which a star produces energy by combining atomic nuclei?
fusion