Science Review Topic 1 Random. Flashcards
Are you insecure? Great idea, lets do some random science questions together!
What is an observation?
Noticing or finding details, examples are color, texture. The 5 senses usually help with this :)
Which of the following is a Hypothesis;
A) If I water plants daily then they will grow faster.
B) If I water plants daily they will grow faster.
C) The plant will grow
B!
What is the variable that is manipulated, or changed?
Independent Variable
What is the dependent variable in this situation;
John wanted to see if plants grew when he was away, so he set up a system to water his plants on his 4 day trip. What is the dependent variable?
The amount of inches the plant grew
What is a control group; and why is it important to experiments?
A Control group is the group that is not tested, this is important because it shows baseline results.
What is DNA?
The genetic code inside of cells.
What are cells?
The building block of life, organisms and species. (including us!)
What is the combination of energy and chemical reactions in our body?
Metabolism
Homeostasis is the process where living things maintain a _______ internal enviorment.
Stable!
Taken as a group, living things evolve, linked to a common origin.
Evolution (^o^)
Define friction
a force that resists motion
Cause of Friction
contact between materials (molecules touch)
Symbol of Friction
F to the power of f
What is Friction measured in?
newtons (N)
Name 3 types of friction
air, liquid, rolling
How can you increase friction
change material, change weight, change amount
If a bowling ball is moving forward what is the direction of friction
backwards
How can you decrease friction
make the surface smother, change material.
weight is
a measure of an objects gravity (hint: its measured in newtons)
mass is
the amount of matter an object is made of
gravity is
an attraction between all matter
more mass =
more gravity & matter
gravity is a ___ & ______ force
gravity is a weak and fundamental force.
gravity weaknesses as distance _____
increases
center of gravity is ____
imagined (based on perspective)
free fall is when an object accelerates with only
gravity
true or false: gravity can cause acceleration
true!
define Net Force (FNet)
combination of all forces acting on an object
forces in the same direction
add to become stronger
forces in the opposite direction are
subtracted to become weaker
if one ball is moving with the fnet of 5 and the friction is 2 what is the FNET.
3 would be the fnet
velocity is
speed in any direction
acceleration is
the rate at which the object is speeding up
name a type of acceleration
speed up, slow down, change direction
balanced forces
forces that cancel out
unbalanced forces
forces that don’t cancel out
balanced forces are _ FNet
0
unbalanced forces have a _____ FNet
positive
Normal forces are
forces that exert when something presses against it.
