Metals, Nonmetals, Metalloids
Chemical Reactions
Properties of water
Acids and Bases
7th grade Review
100
How is density different from Metals to Nonmetals?
metals have high density
Nonmetals have low density
100
What type of change does combustion indicate
chemical
100
dew drops forming on a leaf is an example of
cohesion
100
What pH numbers indicate a base
8-14
100
What is the function of your integumentary system?
act as a barrier, protect
200
The word malleable describes what classification on the periodic table
metals - cam be hammered or rolled into shape
200
Evaporation describes what type of change
physical
200
A drop of water falling down a window
Adhesion
200
What are at least 2 key properties of acids
0-6 pH, watery, sticky, reacts with metals, turns blue litmus paper red, taste sour, releases H ions
200
What is the function of a ribosome
make protiens
300
Semi conductor describes what classification on the periodic table?
metalloid - can conduct electricity under certain situations
300
Define precipitate.
2 liquids mixed that form a solid
300
the property that would keep a paperclip floating on top of a beaker of water
Surface tension
300
What pH numbers indicate a acid
0-6
300
What are the features seen at a convergent boundary, must have all
volcano, trench, mountain
400
What does brittle mean and what does it classify on the periodic table
breaks easily - nonmetals
400
can you reverse a physical change
yes physical changes are reversible
400
This walking water experiment demonstrates what property
capillary action
400
What are 2 properties of bases?
slippery, used in cleaners, turns red litmus paper blue
400
Define autotroph
an organism that makes its own food using PHOTOSYNTHESIS
500
What is the unique property about metalloids
They share properties of both metals and nonmetals
500
Name all 7 indicators of a chemical reaction
1. Color change 2. Temperature change 3. Bubbles / gases produced 4. Precipitate forms (new substance) 5. Light produced 6. Sound produced 7. Smell/odor
500
Water is a universal _______
solvent
500
What color does the color orange represent on the pH scale?
orange is an acid
500
name all 6 taxonomic kingdoms
Archaea, Bacteria, protista, fungi, plantae, animalia