Topic 1-3 Major Quiz (Science)

Question 1

How are plants used for Food?

Answer 1

Plants produce fruits and vegetables that humans consume as a source of nutrients. About 75% of the world’s food supply is based on 7 major crops.

Question 2

How are plants used for Fiber?

Answer 2

The fiber that we get from plants are used for a variety of items such as, paper, clothes, and rope!

Question 3

How are plants used for Medicine?

Answer 3

More than 7,000 plants are used to create medicine, such as heart drugs, cancer medication, antibiotics, and pain medications. These are called Herbal remedies.

Question 4

What are the names of the 7 Major Crops.

Answer 4

Barley, Wheat, Corn, Rice, Sorghum, Potatoes, and Cassava

Question 5

Describe 3 ways a cactus has adapted to live in its environment.

Answer 5

1. A cactus’s roots can spread out for meters and absorb water almost instantly to prevent it from evaporating. 2. A cactus has spiky leaves to help deter/scare away any predators. 3. A cactus has a waxy cuticle to help prevent water loss. 4. A cactus has a woody tissue to promote height growth.

Question 6

What are the main functions for the leaves, roots, stem, and flower of a plant.

Answer 6

Leaves: Use carbon dioxide, water, and sunlight to photosynthesize and produce glucose.

Roots: Absorb water and nutrients from the soil, and support the plant structure by holding it firmly into the ground.

Stem: Sends nutrients and water from the roots to the leaves of a plant. Supports leaves by exposing them to more sunlight. Stores food.

Flower: Produce/collect pollen for reproduction.

Question 7

Name at least 2 ways that plants reproduce asexually.

Answer 7

Budding: When an organism develops from a bud of an existing organism.

Fragmentation: When an organism divides into smaller parts that slowly develop into organisms.

Spore Formation: When a plant produces many spores, later the spore sacks burst, dispersing all the spores into the air, where they land and germinate.

Vegetative Propagation: When plants reproduce from stems, roots, or leaves.

Grafting: When humans cut off parts of different plants and combine them together.

Layering: When a newly formed organism is partially attached to its respective parent plant during its sprouting/growing stage.

Question 8

What is the equation for Photosynthesis?

Answer 8

Water + Carbon Dioxide + Light = Glucose and Oxygen

Question 9

What does the Xylem and Phloem Do?

Answer 9

Xylem: Tubes that move around water and dissolved minerals that came from the soil.

Phloem: Tubs that transport the sugary sap that is made in the leaves. This sugary sap is the plant’s food.

-Xylem and Phloem are both found in vascular bundles.

Question 10

What are the differences between Pollination and Fertilization? Which one occurs first?

Answer 10

Pollination: When pollen from the male part of a flower travels to the female part of another plant.

Fertilization: When the sperm from the pollen joins the female egg to make an embryo.

Pollination leads to fertilization, so pollination occurs first.

Question 11

What are the function of the parts of a flower?

Answer 11

Pistil: The female part of a flower that uses sperm from the stamen to create an egg/ovule. This egg will become a seed after fertilization. The male part of a flower that produces pollen to fertilize the egg/ovule.

Question 12

What is the order of the reproduction cycle?

Answer 12

Pollination - Fertilization - Seed Formation - Germination - Fruit Formation.

Question 13

What is the main way plants can conserve water?

Answer 13

By closing the stomata holes/pores.

Question 14

What is sexual reproduction?

Answer 14

A type of reproduction that requires 2 parent plants to produce a seed.

Question 15

What is the Embryo?

Answer 15

A tiny living plant found inside a seed.

Question 16

What is genetic engineering?

Answer 16

When scientists make changes to a plant by going inside its individual plant cells and making modifications.

Question 17

What is selective breeding?

Answer 17

When humans choose plants with the best traits and encourage them to reproduce together.

Question 18

What is transpirtaion?

Answer 18

The process in which water evaporates from a plant through tiny holes in the leaves called stomata.

Question 19

What is Osmsosis and Diffusion?

Answer 19

Osmosis: The movement of water from an area where there is a lot to and area where there is not much water. Osmosis is a type of diffusion.

Diffusion: When particles evenly spread out by moving from an area of higher concentration to and area of lower concentration.

Question 20

What is Respiration?

Answer 20

When oxygen is used to release the energy stored. This is the oppositeof photosynthesis.

Question 21

What is chlorophyll and what does chlorophyll do?

Answer 21

Chlorophyll is a special pigment that helps leaves absorb the right type of sunlight. In result of this, the leaves appear to be green.

Question 22

What are the 4 main things plant do in an ecosystem?

Answer 22

-Make oxygen
-Remove carbon dioxide
-Provide food and shelter
-Prevent soil erosion with their roots

Question 23

What are the 2 main types of roots?

Answer 23

Taproots and Fibrous roots.

Question 24

What is a taproot?

Answer 24

A taproot has one main thick root that goes deep into the ground, it also has thin tiny branches called root hairs.

Question 25

What are the qualities of the smaller and larger roots in a Taproot.

Answer 25

Main taproot: Large and fleshy, grows deep into the ground, stores food.

Root hairs: Absorb water and minerals from the soil.

Question 26

What is a Fibrous root?

Answer 26

A fibrous root has many thin roots that spread out over a vast area.

Question 27

What are the qualities of a fibrous root?

Answer 27

-Spread out over a large area
-Close to the surface of the soil
-Can collect rain before it sinks deep into the soil

Question 28

How does osmosis move water up a plant?

Answer 28

Water that is drawn into the root hair by osmosis pushes thin columns of water from the roots through the xylem.

Question 29

How does transpiration help move water up a plant?

Answer 29

When water is lost during transpiration, this creates a partial suction that that pulls water up the tubes in the stem.

Question 30

What is cross pollination?

Answer 30

When a plant is pollinated by a different plant.

Question 31

What is Self-Pollination?

Answer 31

When a plant is pollinated by its own pollen.

Question 32

What is seed disperal?

Answer 32

The spread of seeds after they have fully formed.

Question 33

What is germination?

Answer 33

When a seed begins to grow.