Science

• What is the basic unit that all living things are made of?

  Cells
• What are the main structures found in both animal and plant cells?

  • Nucleus
  • Cytoplasm
  • Cell membrane
  • Mitochondria
  • Ribosomes
• Name two structures that are present in plant cells but not in animal cells.

  Cell wall and chloroplasts
• What are human ova and sperm?

  They are types of cells involved in reproduction
• What does a sperm use to swim towards an egg?

  Flagella
• Name the male reproductive organ where sperm are made.

  Testes
• What is the process called when a sperm fuses with an egg?

  Fertilization
• What harmful effects do carbon monoxide, nicotine, and tar have on the body?

  Carbon monoxide reduces oxygen transport, nicotine is addictive, and tar damages lungs
• What is the process called by which plants produce glucose and oxygen?

  Photosynthesis
• What is the process called by which the human body releases energy from glucose and oxygen?

  Cellular respiration
• What are two functions of the human skeleton?

  • Provides structure and support
  • Protects vital organs
• To which group do flatworms belong: A, B, C, or D?

  Group B (Invertebrate Animals)
• To which group does a mouse belong: A, B, C, or D?

  Group C (Vertebrate Animals)
• What is a parasite?

  A parasite is an organism that lives on or in a host and benefits at the host's expense
• To which group does a daffodil belong: A, B, C, or D?

  Group A (Flowering Plants)
• To which group does a human belong: A, B, C, or D?

  Group C (Vertebrate Animals)
• What is one type of microorganism that can infect a cut?

  Bacteria
• Why is wearing rubber gloves important for a medic's health?

  To prevent the transmission of infections
• Which gas passes into the blood from the air in the lungs?

  Oxygen
• Which gas passes out of the blood into the air in the lungs?

  Carbon dioxide
• Why do the walls of the capillaries and alveoli need to be thin?

  To allow efficient gas exchange
• Why is a large surface area important in the lungs?

  It allows for more efficient gas exchange
• What is the change of state when the wax melts?

  Melting
• What is the state of wax before it melts?

  Solid
• What is the state of wax after it melts?

  Liquid
• Write a word equation for the reaction when carbon burns completely in oxygen.

  Carbon + Oxygen → Carbon Dioxide
• What is true for all fuels?

  Fuels are substances that can be burned to release energy
• What is the poisonous gas produced when fuels containing carbon are burned in limited oxygen?

  Carbon monoxide
• What is the chemical symbol for sulfur?


  S
• What gas is produced when sulfur burns?

  Sulfur dioxide
• How many different elements are shown in the formula for potassium nitrate (KNO₃)?

  Three
• Which element is represented by the symbol K in potassium nitrate?

  Potassium
• What is the total number of atoms shown in the formula for potassium nitrate (KNO₃)?

  Five
• Why did the student place the pH meter in distilled water after testing each solution?

  To clean the pH meter
• What could the student put onto slightly acidic soil to neutralize it?

  Lime
• How could Edward get a sample of salt from sea water?

  By evaporating the water
• How could Edward get a sample of sand from the mixture?

  By filtering the mixture
• What are the differences between mixtures, compounds, and elements?

  • Mixture: Contains two or more elements or compounds that are not chemically joined.
  • Compound: Contains atoms of two or more elements that are chemically joined.
  • Element: Contains only one type of atom.
• Why did Rose stir the mixture of copper sulfate solution and iron filings?

  To ensure the reaction occurs evenly
• What safety precaution should Rose take during the experiment?

  Wear safety goggles