science questions?

Question

1. what is a device to make work easier
2. what is the strong,flexible tissuethat holds bones together
3. the gases of air surrounding the earth are called _____?
4.the energy used to brighten a lightbulb is______?
5.name the mineral that strengthens the bones.

6th grade science

6th grade science

Answer 1

1-A 'simple' machine, ex: pulley, incline plane, lever, etc.
2-Cartilage. Unless you are referring to holding different bones next to each other such as the two that meet by the knee, then it is tendon (muscle to bone) and ligaments.
3-Atmosphere.
4-Electricity to start, heat from the resistance of the electricity makes it glow, if it is an incandescent light, a fluorescent is different story as are 'neon' lights.
5-Calcium is the main one, however, through in some phosphorus.

Answer 2

3. It contains roughly 78% nitrogen and 21% oxygen, trace amounts of other gases, and water vapor. This mixture of gases is commonly known as air. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation and reducing temperature extremes between day and night.

5. calcium.

Answer 3

1. A machine (like a robot)
2. Cartliage (like cart dont lie about your age)
3. Atmosphere (like At most fear a bad grade)
4. Electricity ( like Carmen Elecktra?!)
5. Calcium (milk has it and "Milk does a body good!)

Good Luck Ms. J, YF Blue

Answer 4

1. A machine
2. Cartilage
3. Atmosphere
4. Electricity or Kinetic Energy
5. Calcium

1 am not sure

Answer 5

1. simple machine
2. ligaments
3. atmosphere
4. electric
5. calcium

Answer 6

tools
cartilage
atmosphere
work
calcium