Unit 1: Matter
What is the difference between a chemical change and a physical change?
Chemical change cannot be undone and a new substance is created, while a physical change can and the substance stays the same.
What causes water to evaporate in the water cycle?
energy from the sun
Which type of ecosystem is terrestrial?
A estuary
B forest
C lake
D ocean
B forest
What is a force?
a push or pull
What is the order of cell organization?
cell - tissue - organ - organ system
Which object is a good INSULATOR?
a. nail
b. penny
c. paperclip
d. rubber band
d. rubber band
What part of the water cycle do water droplets cool and clouds form?
condensation
What is friction?
a force that happens when two things rub against each other
What organ system has the brain, spinal cord, and nerves.
nervous system
Which activity will result in a new substance when completed?
A breaking a pencil in half
B chopping wood
C roasting a marshmallow
D softening butter
C roasting a marshmallow
When the temperature decreases and humidity increases, what type of weather would you expect?
a. Sunny and Clear skies
b. Cloudy and Rain
c. Sunny and windy
d. Clear skies and cold
b. Cloudy and Rain
Jasmine is collecting items to make an aquatic ecosystem. Where will Jasmine most likely find the things she needs?
A around a pond
B in the woods
C in her backyard
D around a garbage can
A around a pond
What is gravity?
a force that pulls objects down towards the center of the earth
What is the difference between a inherited trait and acquired trait?
An inherited trait is passed down through generations and inherited from your parents (eye color). An acquired trait is what you get over time (ear piercing)
Janice is holding a metal wire attached to a rubber handle. The wire gets very hot in the flame, but the rubber handle remains cool.
Which statement is true about the rubber handle and the metal wire?
A The metal wire is a poor conductor, and the rubber handle is a poor insulator.
B The metal wire is a good conductor, and the rubber handle is a good insulator.
C The metal wire is a poor conductor, and the rubber handle is a good insulator.
D The metal wire is good conductor, and the rubber handle is a poor insulator.
B The metal wire is a good conductor, and the rubber handle is a good insulator.
Explain the difference between high pressure and low pressure.
High pressure - happy weather (clear skies, light rain, sunny)
Low pressure - lousy weather (heavy rain and winds, storms)
A student collects a water sample from an aquatic ecosystem. The student observes that the water sample contains salt particles.
From which ecosystem does the student most likely collect the sample?
A freshwater river
B freshwater swamp
C lake
D ocean
D ocean
What does a constant speed look like on a graph?
a straight line go upwards /
What is the difference between learned and instinctive behavior?
Learned behavior is what your learn over time like riding a bike. Instinctive behavior is what you are born knowing how to do like crying or breathing
Kasey prepared 250 g of lemonade in a jar by adding some amount of water, sugar, and lemon juice.
If the lemonade contained 45 g of sugar and 35 g of lemon juice, how much water was in the solution?
A 170 g
B 205 g
C 215 g
D 250 g
A 170 g
Describe the gulf stream?
Name the parts of a food chain and give examples with each.
The sun - producer - consumer - decomposer
A constant line going from the top of the graph to the bottom indicates what ( \ )?
a constant decrease
Name all the the body systems, 1 organ in each, and what they do.
Skeletal - protects your organs (bones, cartilage)
Muscular - helps you move (muscles, tendons)
Digestive - gives you nutrients (stomach, intestines, esophagus)
Respiratory - helps you breathe (lungs, mouth, nose)
Circulatory - pumps blood through your body (heart, blood, blood vessels)
Nervous - sends messages through the body (brain, spinal cord, nerves)