Cells
True or False: Microscopes can help to magnify small matter that might not be examinable under the naked eye.
True
True or False: We see and can feel energy and the changes it makes.
False we cannot see or feel energy but can feel and observe the changes energy makes.
True or False: The skin is the largest organ.
True
True or False: The reactants are new substances that are formed and products are the starting materials.
False
True or False: All particles are atoms but not all atoms are particles.
False, all atoms are particles, not all particles are atoms.
Which organelle is said to be the 'powerhouse' of the cell?
Mitochondria
Name 3 forms of energy.
Kinetic, Potential, Chemical, Electrical, Thermal, Sound, Elastic.
Does an autotroph or a heterotroph create their own food?
Autotroph
Do physical changes form new substances?
No, there is the same combination of atoms but the appearance might change.
Is this statement correct: The periodic table is complete and will not be changed.
Incorrect; the periodic table is still a work in progress, it is added to as new elements are found.
What is stored in the Nucleus?
DNA (Deoxyribonucleic acid). The building instructions.
Fill in the blank: There are strong forces that hold an atom together. Overcoming these forces by combining atoms or breaking an atom apart releases _____ energy.
Nuclear
Why is the left side of the heart thicker than the right side?
The left side of the heart has further distances to pump and therefore needs to be more muscular to push the blood as far as the head and toes.
What are 3 signs that a substance has chemically changed?
colour change, odour change, bubbles formed, appearance or disappearance of a solid, light or sound, and temperature change.
Fill in the blank: When two or more non-metal atoms are joined by chemical _____ they form a molecule.
bonds
What is the difference between prokaryotic and eukaryotic cells
Prokaryotic - simple self-sufficient, lack membrane bound organelles and are found in unicellular organisms.
Eukaryotic - more complex, have membrane bound organelles and can be both found in unicellular and multicellular organism.
What type of energy includes: movement, electrical energy, and thermal energy.
Kinetic
What are the 2 roles of blood in the body?
- delivers nutrients like oxygen directly to cells
- takes away carbon dioxide and other waste from cells
What is the law of conservation of mass?
What is the difference between an element and a compound?
Element - only contains one substrate (one pure element)
Compound - contains two or more different elements that are chemically bonded together.
What effect might a problem in the Golgi apparatus affect the overall function of the cell?
Proteins would not be properly modified, packaged, and transported.
What is the difference between energy transfer and energy transformations.
Transfer - moves energy from one place or item to another without changing form. (e.g. heat transferring from a hot cup to your hand)
Transformation - energy changes from one form to another. (e.g. a TV transforms electrical energy into light and sound).
Name 5 different body systems.
Skeletal, Muscular, Circulatory, Respiratory, Digestive, Excretory, Integumentary, Immune, Nervous, Endocrine, Reproductive,
What must happen in order for a change to be chemical compared to physical change?
Bonds must be broken and new bonds formed to produce something new.
How are elements ordered on the periodic table?
By atomic number (number of protons in the nucleus of each atom of that element).