force
what is a force?
a push or pull on an object
what is a machine?
a device that does a task. it makes our lives easier and saves time
what are three examples of ways people can use the internet?
to search for information, to communicate with others, to play games, to watch movies, etc
false.
email is a more slow form of communication than text
true or false: fossil fuels are good for the environment
false!!
what is the effect of squishing a ball of slime?
changing the shape
what material powers steam engines ?
coal
what does www stand for?
world wide web
what are two popular apps for instant messaging?
whatsapp, telegram, skype, discord, snapchat
what type of machine is a slide?
inclined plane
name four effects of forces
make objects change shape, break objects, make objects start moving, make objects stop moving
name and describe two types of energy
mechanical energy - the energy an object has because of its motion and position
electrical energy- energy found in lightning , it is called electricity
chemical energy- the energy stored in food, fuels, and explosives
light energy- the energy found in a light source, like the sun
there are three main ways to connect to the internet, which one of these is false: cable, wifi network, radio, and through a data network
radio
what are three tips for safe communication?
never share personal information online, use more than one account, delete spam, dont meet with strangers, ask for help, dont share your friends accounts, dont believe the offers you see, dont lie about your age
what is spam?
spam is unwanted email
name and define the two types of forces
contact force- when two objects touch eachother
noncontact force- when two objects interact, but do not touch
what is a pulley? describe the machine, how it works, and what we use it for
- a wheel with a rope or chain around it
-pulleys change the direction of the force. pulling down on one end of the rope creates and upward pull on the other end
- we use them to lift heavy objects
what two things do we need to search for information on the internet? (besides a computer or smartphone)
a web browser and a search engine
what are four types of applications for communicating on the internet?
email, instant messaging (like text or calling), social networks, and forums
netiquette
what force allows satellites to move around the earth?
gravity
which major invention made it possible for books to be produced more easily? who invented it
the printing press, johannes gutenberg
what are three risks of the internet?
false information, inapropriate content, and irrelevant information
It is always important to THINK before we say or write something. What do the letters in THINK stand for?
hint: (Is it T____? is it H____? is it I_____? is it N_____? is it K_____?)
True
Helpful
Inspiring
Necessary
Kind
what are two machines that allow us to see inside the human body?
X-ray and ultrasound