There are over _____________ microorganisms in and on the human body.
100 trillion
True or False: Antibiotics kill only harmful bacteria.
False
All living things are made of
cells
Antibiotics can reduce both ___ and ___ bacteria
helpful and harmful
Fernando is looking at a cell under a microscope, and he thinks it is a plant cell. Which of the following questions could he ask to determine whether it is a plant cell?
Does the cell have organelles that make proteins?
Does the cell have a gel-like substance that suspends the organelles?
Does the cell have a waxy outer layering that prevents the cell from bursting?
Does the cell have an organelle that contains genetic information and tells the cell how to behave?
Does the cell have a waxy outer layering that prevents the cell from bursting?
Too small to be seen with the naked eye.
microscopic
Researchers are using what new way to treat illnesses?
fecal transplants
True or False: Almost all cells are microscopic
true
Living things with fewer than normal helpful bacteria in their guts can become infected more easily because there is more ___ and ___ available for harmful bacteria
food and space
The purpose of a _____________ _________ is to convince, others using evidence and reasoning.
scientific argument
Living things, such as plants, animals and bacteria.
organisms
All of the microorganisms that live in a particular environment, such as a human body
microbiome
Medicines that kill microorganisms, especially bacteria are called
antibiotics
An infection of harmful bacteria in the human microbiome can make a person ____
sick
True or False: When an organism can reproduce or increase in numbers it is alive?
True
After using antibiotics there are _________ healthy bacteria in the gut.
less
Sickness caused by harmful microorganisms
infection
Which is bigger a cell or a water molecule?
cell
A microbiome is
a home where small organisms live
The four parts of a good scientific argument are:
1. question, 2. claim, 3. evidence ,4. reasoning (explain)
Are microorganisms helpful or harmful?
both
These are tiny structures that make up all living things and are the smallest units able to perform life functions
cells
TRUE OR FALSE: The human biome contains approximately 100 microorganisms
False
Almost all cells are microscopic. This means
They are too small to see with your eyes
Which of the structures is likely a living thing?

II and IV