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Physics portions 6th
Final exam 3 chapters
| Question | Answer |
|---|---|
| What is physics | It is the study of how matter and energy react |
| What is a phenomenah | It is all the information that we gather with our senses |
| What is physics described as | The science so stigating phenomenahs |
| What are the 4 things which can be measured | Length,mass time and temperature |
| What is a common unit used by scientists | Th SI unit |
| What is measurement | Comparison of a known and and an unknown constant |
| Length Mass Time Temperature Current Can all be measured by | Meters,centimeters Kilograms,grams Hours,minutes,seconds *C,*F,K Ampheres |
| What is mass | The quantity of matter possessed by a body |
| What is the principle of the pendulum | A pendulum is the simplest device which is used to study the principle of periodic motion when a pendulum takes a certain amount of time to complete one oscillation is called the time period of the pendulum |
| What does the density of a substance tell us | It tells us wether the substance is light or heavy |
| What does the accuracy of measurement depend on | It depend on the accuracy of the instrument,how we'll we use the instrument,care in setting the device |
| What is temperature | It is the degree of hotness or coldness of a body |
| There are two fixed points | Meting point of ice or freezing point of water Boiling point of water or steaming point of vapor |
| What is the absolute zero | *273 C |
| Clinical thermometer It is used by doctors It contains mercury in a narrow glass called capillary so that it is easily pulled up in the tube with capillary action with the slightest of heat The thermometer is marked for 35-43 degrees C | Laboratory thermometers are used in the labs Mercury is used in thin wall capillary It is marked from 10-110*C There are three scales Celsius,Fahrenheit ,kelvin |
| Characteristics of mass | Mass is the quantity of matter contained in a body Mass can never be zero for then it has no existence mass remains the same any place you go mass has no dependency on direction |
| Characteristics of weight | Weight is the force by which the body is pulled towards the centre of the earth. Weight can be zero.weight can differ from place to place,weight has dependency on direction |
| What are stars | Stars are huge balls of gasses that give out light |
| Planets | Are made up of rocks or gas and do not give out light And move around sun in fixed orbits |
| Dwarf planets | Which orbit around the sun and are smaller than most planets |
| Moon | Is made of rock and is only object beyond earth which man has set foot on |
| Comet | Is made of ice and dust orbiting the the sun |
| Meteor enters the earths atmosphere and burns up | Meteorite rock survives and reaches the ground |
| When earth spins on it own axis it causes day and night this is called | Rotation |
| All stars like our sun is born out of a cloud of gas and dust called the | Nebula |
| When h2 is used up it will become the | Red giant |
| After the white dwarf cools Down it will become a | Black dwarf |
| Any star bigger than the Sun is called a | Massive star |
| When a massive star bursts it turns into a ------------ that will explode to form a -------------- and then a --------------- | Red giant,supernova,blackhole |
| Between Mars and Jupiter there is the | Asteroid belt |
Created by:
Svs
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