Module 2 Concept 1: How do plants grow?

Question 1

an interconnected system of living things and their environment

Answer 1

ecosystem

Question 2

living things such as plants or animals

Answer 2

organisms

Question 3

a model that shows the feeding interactions of organisms in an ecosystem

Answer 3

food web

Question 4

a scientific test in which only one thing is changed at a time, everything else is the same, so you know how the variable you changed affected the results. It lets you test two or more things and compare the results.

Answer 4

fair test

Question 5

the part of a scientific test that can be changed to affect the results

Answer 5

variable

Question 6

the living component of a plant that makes up its structures

Answer 6

plant tissue

Question 7

a chemical process that harnesses energy from sunlight to make food (sugar) out of matter from air and water. Plants use this food to form new tissue.

Answer 7

photosynthesis

Question 8

matter that organisms release into their environment (ex. Plants release oxygen as waste. Humans release carbon dioxide as waster)

Answer 8

waste

Question 9

the process of taking in gases needed for life and releasing others as waste

Answer 9

gas exchange

Question 10

Within a food web, the _____________ shows which organism is eating and which organism is being eaten. (Ex. If a large fish eats a smaller fish, the _____ will point from the smaller fish to the larger fish)

Answer 10

direction of the arrow

Question 11

When we conduct a scientific experiment, we must make sure that we use a ________. There should only be 1 variable

Answer 11

fair test

Question 12

A ________ in an experiment will be the part that is exposed to normal conditions, or the part of the experiment that will not have the change in the variable.

Answer 12

control

Question 13

Fair test criteria include:

Answer 13

a. Compare multiple items or conditions
b. Change only one variable at a time
c. Keep all other variable constant

Question 14

Plants use water and air but not soil to create a new substance called __________.

Answer 14

plant tissue

Question 15

_______, _______, and _______ are all made of plant tissue.

Answer 15

Leaves, stems, and roots

Question 16

The leaves of the Mongrove tree take in _________ from the air and give off ________.

Answer 16

carbon dioxide

oxygen

Question 17

Green plants have a substance called _______ in their leaves that traps energy from the sun. It uses the energy from the sun to break water into ______ and _______. The hydrogen is stored in the leaves and the oxygen is released into the air as waste.

Answer 17

chlorophyll

hydrogen and oxygen

Question 18

Plants take in __________ which will combine with the stored up hydrogen and energy from the sun to make _______. The ______ is used as food to build tissue such as leaves, stems, and flowers. This process is called __________.

Answer 18

carbon dioxide
sugar
photosynthesis

Question 19

We don’t say that plants breathe, we call the process __________.

Answer 19

gas exchange

Question 20

The air we inhale contains oxygen and carbon dioxide. We use most of the ______ and release _______.

Answer 20

oxygen

carbon dioxide

Question 21

Remember our indicators of chemical reactions:

Answer 21

a. unexpected color change
b. odor change
c. gas formation
d. solid formation
e. significant weight change due to gas formation (only when the gas is not trapped)