Term 2 Science Revision Part 2 (Units 4-6)

During a class field trip to a botanical garden, students learn about the process of transpiration. What does transpiration refer to?

• The process of plants absorbing water from the soil

• The release of water vapour from plant leaves into the atmosphere

• The process of photosynthesis in plants

• The absorption of nutrients by plant roots

In a science experiment, students are observing how plants absorb water. They notice that the roots are drawing water from the soil. How do plants primarily absorb water from the soil?

• Through the leaves via photosynthesis

• By evaporation through the flowers

• Through root hairs that increase surface area for absorption

• By the plant wilting and pulling water in

As part of a classroom discussion on plant nutrition, the teacher asks students to identify two essential mineral salts that plants require and their functions. Which of the following pairs is correct?

• Calcium - for leaf growth; Potassium - for fruit development

• Nitrates - for protein synthesis; Magnesium - for chlorophyll production

• Phosphates - for stem strength; Iron - for root health

• Sulfates - for flower blooming; Sodium - for water retention

Why does the rate is high at the start of a reaction according to particle theory?

• Particles are moving slowly

• There are more particles available to react

• The temperature is low

• There is less surface area

Emma is conducting an experiment where she mixes vinegar and baking soda. Over time, she notices that the rate of bubbling decreases. Why does the rate of reaction decrease over time according to particle theory?

• More particles are created

• Less reactant is available

• The temperature increases

• The reaction has not started

What is particle theory?

• A theory about the movement of particles in solids only

• A theory that explains the behavior of particles in different states of matter

• A theory that only applies to gases

• A theory that relates to chemical reactions only

During a chemistry lab experiment, Charlotte is measuring how quickly the reactants in her reaction are being consumed. What does this measurement define?

• The speed at which reactants are consumed

• The amount of product produced

• The temperature at which a reaction occurs

• The volume of gas released

What are four factors that affect the rate of reaction? Explain the reasons.

• Temperature, concentration, surface area, and catalysts; they influence collision frequency and energy.

• Color, smell, taste, and texture; they change the appearance of substances.

• Pressure, volume, mass, and shape; they affect the form of reactants.

• None of the above.

What are some proper ways to analyze the graph of the rate of reaction? Provide tips and mechanics.

• Look for trends, identify maximum and minimum points, and calculate slopes.

• Ignore the axes and focus on the colors.

• Only look at the beginning of the graph.

• Compare it to other graphs without context.

During a science experiment, Scarlett plotted the growth of a plant over several weeks. If one week's growth measurement does not fit the predicted growth graph, that graph is considered an outlier and the graph is anomalous.

• True

• False