Unit 1
A series of steps used by scientists to solve a problem or answer a question.
What is Scientific Method
a small particle that is the building block of matter.
3 Subatomic Particles
protons, neutrons and electrons
Mr. Charles is teaching his class about physical and chemical changes and is going to show his class a sheet of paper going through a chemical change.
What can he do to the paper to cause the chemical change?
a. draw on it
b.burn it
d.cut it
b.
what are the 4 spheres of the water cycle
ATMOSPHERE, LITHOSPHERE, HYDROSPHERE, BIOSPHERE
.The summary at the end of an experiment that explains the results.
What is conclusion
What are the two properties ?
What makes them different?
Physical and chemical properties
Physical - Any characteristic of matter that you can observe without changing the identity of the substances that make it up
Chemical - Is the ability or inability of a substance to combine with or change into one or more new substances
What is the charge for the subatomic particles
A. Protons
B. Neutrons
C.Electrons
a. positive
b. neutral
c. negative
Todd is comparing two brands of batteries. He uses two identical flashlights to see
which battery lasts longer. What is the best reason for this experiment to be repeated?
to check whether the results are consistent
The abbreviated timeline shows several events in history regarding DNA.
· 1869-DNA first isolated
· 1953-DNA determined to be in a double helix
· 2003-Human genome mapped
What does this tell us about scientific knowledge over time?
SCIENTIFIC KNOWLEDGE IS ADAPATABLE TO NEW INFORMATION
. Dependent variable, also known as the outcome variable means :
A) The scientist controls what to test
B) educated guess
C)Ask a question
D)What is being measured
D) What is being measured
3 types of matter and their shape and volume
Solid - Is matter that has a definite shape and definite volume •Particles vibrate in place
Liquid - Is a matter with a definite volume but NO definite shape.•Liquids can flow and can take shape of container
Gas - is a matter that has no definite volume and has no definite shape.
Who is the original Greek philosopher who developed the atomic theory of matter?
Democritus
In some areas, limestone is found underneath the soil. In these areas, water can wear away the limestone and sinkholes may form on the surface. What is responsible for the formation of sinkholes?
Sinkholes are common where the rock below the land surface is limestone, carbonate rock, salt beds, or rocks that can naturally be dissolved by groundwater
There are ___________ criteria of science?
6
What is an element? WHERE can it be found?
element is simplest kind of matter, cannot be broken down. found on periodic table
What is the number for acids?
What is the number for bases?
What is neutral?
acids : 1-6
Neutral : 7
Bases : 8-16
The oldest rock formation identified on Earth is found on the shoreline of Hudson Bay in Canada. This rock formed 4.28 billion years ago. What information does a scientist need to determine the age of a rock most accurately?
To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed
. All the observations, measurements, and data scientists gather in support of a scientific explanation
A) Hypothesis
B)Valid
C) Invalid
D)Empirical Evidence
What is empirical evidence
. Ella is planning an experiment. She wants to see how fast milk will sour at different temperatures. She places a glass of milk under a warming lamp (35°C) and leaves another at room temperature (25°C). She checks the milk every three hours. Which outcome is most likely?
A. Neither glass of milk will sour.
B. Both glasses of milk will sour at the same time
C. The milk under the warming lamp will become sour more quickly.
D. The milk left at room temperature will become sour more quickly.
c.
Two atoms of the same element but with different mass numbers are called______
What is isotope