Biology
Chemisty
Lab materials
Thinking and Working Scientifically
Anatomy of a Leaf
100

It is the basic structural, functional, and biological unit of all living organisms.

What is a cell?

100

This particle has a positive charge and is found in the nucleus of an atom.

What is a proton?

100

This glassware is used to measure exact volumes of liquids.

What is a graduated cylinder?

100

This is the first step of the scientific method, where scientists identify what they want to study.

What is asking a question (or identifying a problem)?

100

This upper layer of cells is transparent and allows light to pass through to the chloroplasts.

What is the upper epidermis?

200

This part of the cell controls all of its activities and contains DNA.

What is the nucleus?

200

The smallest unit of a chemical element that retains its properties.

What is an atom?

200

his piece of equipment is used to heat substances in the lab and has a stand for holding test tubes or flasks.

What is a Bunsen burner?

200

This part of the scientific method involves making an educated guess that can be tested.

What is a hypothesis?

200

This layer contains closely packed cells with many chloroplasts where most photosynthesis occurs.

What is the palisade mesophyll?

300

This organelle is responsible for photosynthesis in plant cells.

What is the chloroplast?

300

This is the element with the chemical symbol O.

What is oxygen?

300

This type of glass container is used for mixing, heating, and holding substances, but is not for precise measurements.

What is a beaker?

300

The variable that is deliberately changed during an experiment.

What is the independent variable?

300

These loosely packed cells with air spaces allow for the exchange of gases within the leaf.

What is the spongy mesophyll?

400

The process by which glucose and oxygen are converted into carbon dioxide, water, and energy.

What is aerobic respiration?

400

his type of reaction absorbs heat energy from its surroundings.

What is an endothermic reaction?

400

This instrument is used to measure the temperature of liquids or gases.

What is a thermometer?

400

The variable that is measured or observed during an experiment.

What is the dependent variable?

400

This vascular tissue carries water and minerals from the roots to the leaves.

What is the xylem?

500

This gas is released as a byproduct of photosynthesis.

What is oxygen?

500

This gas is produced when hydrochloric acid reacts with zinc.

What is hydrogen gas?

500

This tool allows you to measure the mass of an object accurately in the lab.

What is a balance?

500

This is a visual way of representing data to identify patterns or trends.

What is a graph (or chart)?

500

These structures are the tiny openings on the underside of a leaf used for gas exchange.

What are stomata?