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Science finals 8th grade
finals exam
49 cards·by Nashbibibs
finalsexamscience
In an expirement which variable can you change?
Independent
Which variable is being measured in an expirement?
Dependent
What variable stays the same throughout the entire expirement?
Constant
Scientists use there prior knowledge and experience to...
Form a hypothesis
What do we use to analyze data?
Graphs, charts, and tables
Bits of informationyou gather with your senses are called...
Observaions
The information gathered from your senses lead to forming...
Inferences
A flask with a more triangular shape is called?
An erlenmeyer flask
A flask with more rounded shape is called?
A florence flask
What system of units are part of the international system of units, or SI?
Metric system
What is matter?
Anything that has mass and takes up space
What is not matter?
thoughts, energy, and light
Newtons first law of motion states that an object at rest stays at rest unless a _____ acts on it
Force
Inertia is...
the tendency to resist change in motion
What is a force?
an act to create or attempt to create motion
For an ideal machine, the work in is equal to the ____.
work out
A force is exerted on a box and an equal and opposite force is exerted by the box. What law
explains this?
The third law
The growth response related to the number of hours of daylight and darkness is called____.
Photoperiodism
All cells want to mantain a state of _____.
balance
What rids the cell of waste product and brings nutrients into the cell? This process moves
particles from areas of high concentration to low
Diffusion
If a plant is growing towards a source of light this is...
Positive phototropism
Most of the life of a cell is spent in what phase?
Interphase
What does not form in animal cell mitosis but does form in plant cell mitosis?
Cell walls reform
The chromosomes in the nucleus of a cell contain a code known as...
DNA
DNA contains the nitrogen bases of...
Adenine, Guanine, Cytosine, and Thymine
A cell that has two of every kind of chromosome is...
eukaryotic cell
Haploid numbers of chromosomes are usually found in the ___ cells of an organism
Sex
Each human skin cell has __ pairs of chromosomes
23
Hydra reproduce by
budding
In ___________ a body part regrows and may reform a new organism.
regeneration
Mendel called plants that received different alleles for a trait from each parent...
Hydrids
Homozygous is the ___ alleles
same
Heterozygous is ____ alleles
different
Name the phases of mitosis in order
Interphase, Prophase, metaphase, anaphase, telophase
The cell that forms during fertilization
Zygote
A genetic tool that uses letters to represent dominant and reccessive alleles
punnet square
What is the equation for photosynthesis?
6CO2+6H20+light=C6H12O6+602
What is it called when a liquid changes into a gas?
evaporation/boiling
What is it called when a liquid changes into a solid?
Freezing
Who was the first person to study how traits were passed from parent to offsping?
Gregor mendel
How is sublimation different from evaporation, condensation, and melting
It skips a phase (Solid-->gas)
how does an E.R. function in a cell?
It moves materials around in a cell
How does a Vacuole function in a cell?
It stores food, water, and waste.
What does a golgi body do in a cell?
Prepares and packs material to be moved
What happens during meiosis ll?
Four haploid sex cells are formed
Any permenant change in the DNA sequence of a gene or mistakes that happen when DNA is copied.
Mutation
As heat increases during a reaction so does the _____ energy.
kinetic
Another term for heat is.
Thermal energy
going from a gas to a solid
defostion