States of Matter
What happens to the particles of a solid when it is heated and changes into a liquid?
Particles move faster and spread apart
Which device is designed to minimize the transfer of thermal energy? A woolen blanket, glass of ice water, a metal frying pan, or an open window?
Woolen blanket
What usually happens when a wave hits a smooth, shiny surface?
What is the basic unit of life in all living things?
Cell
What is the approximate age of the Earth according to the geologic time scale?
4.6 billion yrs
What happens to the particles in an ice cube as it melts in warm water?
The particles speed up and move farther apart
What does a thermometer measure in substance?
The average kinetic energy of particles
Which material allows most light waves to pass through? Wood, black paper, metal, or clear glass?
Clear glass
Which of the following best describes a multicellular organism?
Made of many cells
What is the main purpose of the geologic time scale?
To organize Earth's history into manageable units
Which change of state occurs when a substance goes from a gas to a liquid?
Condensation
Which material would be best to use as an insulator in a lunchbox to keep food warm? Steel plate, plastic foam, cotton fabric, and aluminum foil?
Plastic foam
What happens to the light when a flashlight is shined at a mirror and at a piece of black paper?
The mirror reflects the light, and the paper absorbs it
Which part of the cell controls what enters and leaves the cell?
Cell membrane
Which process is responsible for the formation of mountains over millions of yrs?
Plate tectonics
What does the formation and rising of bubbles when water boils indicate about the state of the particles inside the bubbles?
The particles are in a gas state
Material choice for a container to keep a drink cold?
Foam
What happens when light passes through frosted glass?
Some light is transmitted, but it is scattered
What is the main function of the nucleus in a cell?
Controls cell activities
Which of the following is evidence that continents were once joined together?
Similar fossils found on different continents
A student observes that when a solid is heated, it melts into a liquid. Which model best explains this change?
The particles in the solid move faster and break free from their fixed positions
How would you test which material works best to keep a hot drink warm?
Measure the temperature of the drink after a set time using each material
A student notices that sound is quieter when it passes through a wall than through an open door. What does this observation show about waves?
Waves can be absorbed by materials
Which of the following is an example of a unicellular organism?
Bacterium
Which of the following best explains why sedimentary rock layers are useful for understanding Earth's history?
They contain fossils and show the order of events