What is Science?
A tentative scientific explanation that can be tested further is known as?
A hypothesis
What is one of the scientific attitudes scientists need?
Curiosity
Skepticism
Open-mindedness
Creativity
How many characteristics of life are there?
8
Name the 3 subatomic particles and their charges.
Proton - positive
Neutron - neutral
Electrons - negative
Why is it this shape?
Looks like Mickey Mouse
Water is polar (one side is positive and one side is negative)
What are the four elements that make up 96% of all living things?
Carbon
Hydrogen
Oxygen
Nitrogen
What is a chemical reaction?
A process that changes or transforms one set of compounds into another
Is this an inference or a hypothesis?
A student did well on the test because the student studied hard.
Inference
Why are articles/scientific findings shared with the world?
Allows them to share ideas and evaluate and test the data/analysis
What unit system do we use to measure in science?
Metric system
Finish the definition
Isotopes - atoms of the same element that differ...
In the number of neutrons
What is the attraction between molecules of the same substance called?
Cohesion
Short term energy storage
In a chemical reaction, what happens to the energy?
It is either released or absorbed
In a controlled experiment, which group stays the same and which group gets one variable changed?
Control group - stays the same
Experimental group - one variable is changed
What is bias?
A personal, rather than scientific point of view for, or against something
True or false: Viruses are living.
False
What is a compound?
Two or more elements that are combined in definite proportions
What is adhesion?
Attraction between molecules of different substances
Which macromolecule is for long-term energy storage?
Lipids
What is the function of an enzyme?
Lowers activation energy and speeds up chemical reactions in cells
What is a scientific theory?
An explanation of events in the natural world that is supported through repeated observations
What other field goes hand in hand with science to solve problems?
Engineering
What is the smallest item that makes up all living things?
What is the largest item that makes up all living things?
Cells (smallest)
Organ systems (largest)
Which type of bonds transfers electrons?
Ionic bonds
Which property of water allows insects to walk on water?
Cohesion
What is the function of nucleic acids?
What are the two nucleic acids in the human body?
To store, transmit, and express genetic information
DNA and RNA
What is a substance that speeds up the rate of a chemical reaction?
Catalyst
Identify the dependent and independent variables.
A scientist wants to see how water affects plant growth. He adds a normal amount, a little, and a lot of water to plants. He repeats this and after this days he measures each plant's height.
Dependent: plant's height
Independent: amount of water
How is the use of science related to its context in society?
Solves human and environmental issues
What are the characteristics of life?
1. Cells
2. Growth and development
3. Reproduction
4. Homeostasis
5. Universal genetic code
6. Respond to their environment
7. Need for materials and energy
8. Evolution
What is a covalent bond?
Formed when atoms share electrons
Water is known as the universal solvent. What property helps it dissolves so many solutes?
Its polarity
What are the monomers of proteins?
What is their function?
Monomers - amino acids
Function - control rate of reactions and regulate cell processes
What does an enzyme need to bond to in a reaction?
How many of these can it bond to?
Substrate
One