M

The prefix "micro" means

• large.

• tiny.

• extreme.

How can we control the spread of microorganisms?

• spit them out

• blow your nose

• wash your hands

• pet a dog

Scientists often use models to represent things that are too small to see with out microscope. The advantage of a model like the one below, which shows the interior cells of a plant leaf, is that it allows scientist to study the structure of a plant leaf and how it relates to cell theory. How does this model support cell theory.

• the model shows that although some cells obtain energy from food, other cells do not require energy at all. This supports the part of the cell theory that states all cells do not require energy

• The model shows that all the cells in a leaf are identical. This supports the part of the cell theory that states that all the cells in an organism are exactly the same.

• The model shows that leaves are made of chlorophyll, a nonliving substance. This supports the part of cell theory that states that plants are nonliving things

• The model shows that a leaf is composed of many different kinds of cells. This supports the part of cell theory that states that all organisms are composed of cells.

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

List the steps of the scientific method

d

e

f

c

b

a

Communicate results

Conduct experiment

Form a hypothesis

Draw conclusions

Analyze results

Ask a question

Tags

NGSS.MS-PS2-2

The diagram shows some of the layers of rocks found in the Grand Canyon. Scientists find these layers of rock useful for studying fossils
What type of rock is shown labeled in these layers?

• extrusive

• igneous

• metamorphic

• sedimentary

Tags

NGSS.MS-ESS1-4

What does the prefix 'mega' mean in scientific terms?

• A) Small

• B) Large

• C) Medium

• D) Tiny

Which of the following is a unit of mass in the metric system?

• A) Meter

• B) Liter

• C) Gram

• D) Second

What is the chemical symbol for Magnesium?

• A) Mg

• B) Mn

• C) Mo

• D) Ma

Which of the following elements is a metal?

• A) Oxygen

• B) Nitrogen

• C) Magnesium

• D) Helium

What is the molecular formula for methane?

Tags

NGSS.MS-PS1-1