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Small pellets of frozen carbon dioxide demonstrating sublimation by going straight from a solid to gas state.
Group of multiethnic people on street holding blank cardboard placard celebrating victory during a protest. Group of content men and smiling women marching through a city. People protesting on road.
Demo icon demonstrating a product beta software. A blueprint or scale model - 3d illustration
Poster attached by a protester with the word Stop in english and arabic during a demonstration.
Happy teacher teaching how to do the column additions at elementary school. Smiling man explaining additions in column in primary class while writing on whiteboard. Math’s teacher explaining sums.

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