Easy Review
Nature of Science: What is an Inference?
A logical conclusion based on observations and prior knowledge.
Plant Cell vs Animal Cells: Which cell has a cell wall—plant or animal?
A: Plant cell
Nature of Science:What is the difference between an observation and an inference?
A: Observation = what you see; Inference = what you think based on evidence
LANDFORMS: How does weathering differ from erosion?
A: Weathering breaks down rock; erosion moves it
A student observes a plant growing toward sunlight. Is this an observation or inference, and why?
A: Observation (you can see it growing toward light).
Plant Cell vs Animal Cell: What is the shape of a "Plant Cell"?
Boxy Shape or Square shape.
Nature of Science: A scientist says, “The rock looks smooth and shiny.” Is this qualitative or quantitative?
A: Qualitative
Plant Cell vs Animal Cell: What organelle helps plant cells make food using sunlight?
A: Chloroplast
STATES OF MATTER: Why can gases be compressed but solids cannot?
A: Gas particles are far apart; solids are tightly packed
A scientist finds an animal with no backbone, six legs, and an exoskeleton. How should it be classified and why?
A: Invertebrate, because it has no backbone (also an insect based on traits)
Plant Cell vs Animal Cells: What is the control center of the cell?
A: Nucleus
Classification: A fish, frog, and bird all share what classification trait?
A: They are vertebrates
States of Matter: Name one example of a liquid?
A: Water (or juice, milk, etc.)
Plant Cell vs Animal Cell: Why do animal cells not need a cell wall?
A: They need flexibility for movement
Two landforms are observed: one is a canyon and one is a volcano. Which is destructive and which is constructive, and why?
A: Canyon = destructive (erosion), Volcano = constructive (builds land)
States of Matter: What state of matter is air?
A: Gas
Landforms: Building a volcano island from lava is an example of what type of landform?
A: Constructive landform
A whale lives in water—why is it still classified as a mammal?
A: It has a backbone, breathes air, and nurses its young
Nature of Science: A student says, “The rock is heavy.” Why is this NOT a strong quantitative scientific observation?
A: It is not measured (not quantitative)
A student says, “This cell must be an animal cell because it has a nucleus.” Why is this incorrect?
A: Both plant and animal cells have a nucleus
Classification: Animals with backbones are called what?
A: Vertebrates
Nature of Science: If you measure something as 12 inches long, what type of observation is that?
A: Quantitative
Classifications: Give one reason why insects are considered invertebrates
A: They do not have a backbone
Nature of Science: Why can gases be compressed but solids cannot?
A: Gas particles are far apart; solids are tightly packed
A student observes a rock and records: “The rock is gray, smooth, and weighs 200 grams.” Which parts are qualitative and which are quantitative observations?
A: Qualitative = gray, smooth, Quantitative = weighs 200 grams