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Life Science

Mid Term SG

What is meant by “life science”? What are possible sub-fields of study? Why is it important to all people. The study of all living things is life science. The possible sub-fields of study are biochemist, zoologist, teacher, and dentist. This is important to other people because it gives them more information about yourself.
What is the scientific method and how does it involved questions? The scientific method is the ways in which scientists follow steps to answer questions and solve problems. It is involved in questions because people make observations and ask questions about the observations.
What is a hypothesis? A hypothesis is a possible explanation or answer to a question that must be testable in order to be useful.
What is a controlled experiment? A controlled experiment is when it tests only one factor at a time and consists of a control group and one or more experimental groups. (One variable)
What are models and how are they used? Models are representations of objects or systems.They are used to represent things very small, very large, and very complicated.
What are the differences in the three types of microscopes? They scan in different ways. One bounces electrons off of it, the other passes electrons through it, and the last one sends electromagnets through it to create images. They are compound light, scanning, transmission electron.
What is the International System of Units, or Metric System? The International System of Units is the Metric System. It is used by most scientists and almost all countries.
What are the characteristics of all living things? The characteristics of all living things are that they have one or more cells, sense and respond to change, reproduce, have DNA, use energy, and grow and develop.
What are the differences between eukaryotes and prokaryotes? Eukaryotes have a nucleus, more than one cell, larger size, has organelles. Prokaryotes do not have a nucleus, have only one cell, smaller size, does not have organelles.
What are the differences between plant and animal cells? The differences between the plant and animal cells are that plant cells have a large central vacuole, a cell wall, chloroplast.
What are the parts of the cell called and what is the purpose of each part? The parts of the cell is called cell membrane, ribosomes, vacuoles/lysosomes, nucleus, and r/s endoplasmic reticulum. The purpose of each part is different, because some dispose of waste or control all of the cell’s activities.
Why does a cell need energy and what form does that energy need to be? A cell needs energy because it is used to do the cell’s activities. The energy needs to be in the form of ATP.
How much water is in your body? 70%
What is cell theory and what does it mean? The cell theory is 1) all cells come from existing cells. 2) All organisms are made up of one or more cells. 3) The cell is the basic unit of all living things. It means that each scientist observed this and called it a cell. (Pg. 61)
What is sexual versus asexual reproduction? Sexual reproduction is when 2 parents produce offspring that share their characteristics through this. Asexual reproduction is when a single parent produces offspring identical to the parent through this.
What is active transport, and what are some examples? Active transport is the movement of substances across a cell membrane using energy by the cell. Examples of active transport is when the sodium–potassium pump uses energy to move sodium and potassium ions against their concentration gradients.
What is a consumer and a producer? A consumer is an organism that eats other organisms or organic matter. A producer is an organism that can make its own food by using energy from its surroundings.
What is the difference between photosynthesis and cellular respiration? The difference between photosynthesis and cellular respiration are that C.R. uses oxygen from lungs to bring to cell and it happens in the mitochondria and P. uses energy from the sun and it happens in chloroplast.
What is the benefit of being a larger organism over a very small organism? The benefit of being a larger organism than a small organism are 1) larger size 2) longer life 3) specialization 4) Not many predators.
What are the steps of cell division and what is that process called? The steps of cell division are Prophase, Metaphase, Anaphase, Telophase. This is called Mitosis.
What are the levels of organization beginning with the single cell and going up to organism? Cells, tissues, organs, organ systems, organisms
Who were the people who first saw organisms under the microscope? The first people to seen organisms under the microscope were Robert Hooke and Anton Van Leeuwenhoek.
What are the parts of the nervous system and what do they do in the body? The parts of the nervous system are CNS includes the brain and the spinal (cords). The PNS includes everything but the spinal cord and brain. The CNS sends signals to the PNS through the spinal cords. PNS carries CNS information to the rest of your body.
What are the parts of the skeletal system and cardiovascular system? The parts of the skeletal system are the bones, joints, and cartilage. The parts of the cardiovascular system is the heart, capillaries, arteries, and veins.
What are the possible blood types in humans? A, B, AB, O
What is technology? Technology is the application of science for practical purposes and the use of tools, machines, materials, and it processes to meet human needs.
What units are used in this system for weight, volume, temperature, length? The units used in this system for weight, volume, temperature, and length are Length: meters Volume: cubic centimeter, Temperature: Celsius, and Kelvin, and Weight: gram.
What is a decomposer? A decomposer is an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients.
What is passive transport and examples of each? Passive transport is the movement of substances across a cell membrane without the use of energy by the cell. Examples of passive transport are diffusion and osmosis.
Created by: mjys02