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Science 8/9 Midterm
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Definite volume and shape - is this a solid, liquid, or gas?
solid
Definite volume and holds shape of container it is in - is this a solid, liquid, or gas?
Liquid
No definite volume or shape - is this a solid, liquid, or gas?
Gas
Liquid to gas
Evaporation
Liquid to solid
freezing
Particles move the fastest and have a lot of space between them - solid, liquid, gas?
gas
Particles are very close together and only vibrate in place - solid, liquid, gas
Solid
Gas to liquid
condensation
Solid to gas
sublimation
What does this symbol represent?
Exploding bomb or explosion hazard
What does this symbol represent?
Biohazardous material
What is required for photosynthesis? (3)
Sun, water, carbon dioxide
Name a part of the cell that's only found in plant cells (2 possible)
chloroplast or cell wall
What does the cytoplasm in a cell do?
Controls materials that enter and exit the cell
Injected weakened particles to help defend against infection. What is this describing?
Vaccine
The symbol "K" represents what element?
Potassium
Group 1 on the periodic table (excluding hydrogen) is known as the A) alkali metals B) alkaline earth metals C) transitional metals D) noble gases
A
In a periodic table, vertical columns are called: A) rows B) periods C) groups D) noble gases
C
A horizontal row on the periodic table is called A) a period B) a group C) a family D) a series
A
Which element is not found in group 12 of the periodic table? A) Zn B) Hg C) Ga D) Cd
C) Ga
What is the element found in the periodic table in group 4 and period 6? A) hafnium B) selenium C) gadolinium D) chromium
A
The melting point of gallium is what type of characteristic? A) elemental property B) chemical property C) physical property D) magnetic property
C
Elements in Group 18 on the periodic table are known as the A) halogens B) alkaline earth metals C) transitional metals D) noble gases
D
What is the correct number of neutrons in an atom of Cr? A) 30 B) 54 C) 24 D) 36
C
An atom of titanium has a mass number of 48 and an atomic number of 22. A second titanium atom could have the following number of subatomic particles: A) 26 p, 22 e, 22 n B) 21 p, 21 e, 26 n C) 22 p, 22 e, 24 n D) 22 p, 26 e, 22 n
B
The number of subatomic particles in an atom of Br is: A) 80e, 80p, 35n B) 35e, 80p, 35n C) 35e, 35p, 35n D) 35e, 35p, 45n
D
Which of the following terms best represents a disease-causing organism? A.pathogen B. antigen C. antibody D. plaque
A. Pathogen
What is produced during cellular respiration? (3)
Energy + Carbon Dioxide + Water
What is the main difference between eukaryotic cells and prokaryotic cells?
A eukaryotic cell has a nucleus, a prokaryotic cell does not
Name the part of the cell that contains DNA
nucleus
What does the mitochondria do in a cell?
Provides the cell with energy
Breaking glass. Physical or chemical change?
physical
Jello is an example of what type of mixture? Homogenous or heterogenous?
Homogenous
Baking soda and vinegar make carbon dioxide. Physical or chemical change?
chemical
True or false: It is okay to smell a substance as long as the teacher gives permission.
True
True or false: when you are done with a chemical, you should immediately pour it down the sink.
False
What does this symbol represent?
corrosive material
Nitrogen is an example of what type of pure substance? compound or element?
element
Blow drying wet hair is an example of chemical or physical change?
physical
Food is digested. Is this an example of a chemical or physical change?
chemical
Alcohol evaporates is an example of a chemical or physical change?
physical
A nail rusting is an example of a chemical or physical change?
chemical
Milk is an example of what type of mixture? Homogenous or heterogenous?
Homogenous
Water is an example of which type of pure substance? Element or compound?
Compound
A heterogeneous mixture has A) only one component B) at least two components which look like one substance C) at least two visible components D) a uniform distribution of a single phase
B
Oxygen is an example of what type of pure substance? Element or compound?
Element
Salt water is an example of what type of mixture? Homogenous or heterogenous?
Homogenous
What type of vegetative propagation is this an example of?
grafting
In which of the following cells does mitosis not take place?A) sperm B) skin C) liver D) bone
A
During meiosis, the pairing of homologous chromosomes, occurs during A) prophase I B) prophase II C) anaphase I D) anaphase II
A
An adult cat's skin cells have 38 chromosomes. The diploid number of chromosomes is: A) 38 B) 76 C) 19 D) the same number of chromosomes in a cat's sperm cells
A
What kind of vegetative propagation is this?
simple layering
What is the name given to the stage of the cell cycle in which the cytoplasm divides? A) Prophase B) Interphase C) Cytokinesis D) Mitosis
C
What phase of mitosis is this?
metaphase
During anaphase: A) the cytoplasm divides B) the chromosomes move to opposite ends of the cell C) vitamin B is synthesized D) strands of DNA unravel
B
Sexual reproduction A) involves diploid gametes joining to form a zygote. B) produces offspring that are genetically different from both parents. C) Involves the production of gametes by mitosis
B
Fertilization results in: A) a reduction division B) haploid ova C) a diploid zygote D) a monoploid zygote
C
In meiosis, cytokinesis occurs A) once B) twice C) three times D) four times
B
Asexual reproduction differs from sexual reproduction because it: A) does not use all the cells of the body B) uses only gamete cells C) does not involve an exchange of genetic material D) involves an exchange of genetic material
C
What type of asexual reproduction is this?
budding
Which type of reproduction, sexual or asexual, involves 2 parents?
Sexual
What is the correct order of mitosis (just 4 cell division phases?)
Prophase, Metaphase, Anaphase, Telophase
How many chromosomes are in diploid human cell?
46


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